You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: merge.go
    path of file: ./repos/kubernetes/vendor/github.com/imdario/mergo
    
    the code of the file until where you have to start completion: // Copyright 2013 Dario Castañé. All rights reserved.
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Based on src/pkg/reflect/deepequal.go from official
// golang's stdlib.

package mergo

import (
	"fmt"
	"reflect"
)

func hasExportedField(dst reflect.Value) (exported bool) {
	for i, n := 0, dst.NumField(); i < n; i++ {
		field := dst.Type().Field(i)
		if field.Anonymous && dst.Field(i).Kind() == reflect.Struct {
			exported = exported || hasExportedField(dst.Field(i))
		} else {
			exported = exported || len(field.PkgPath) == 0
		}
	}
	return
}

type Config struct {
	Overwrite    bool
	AppendSlice  bool
	Transformers Transformers
}

type Transformers interface {
	Transformer(reflect.Type) func(dst, src reflect.Value) error
}

// Traverses recursively both values, assigning src's fields values to dst.
// The map argument tracks comparisons that have already been seen, which allows
// short circuiting on recursive types.
func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) {
	overwrite := config.Overwrite

	if !src.IsValid() {
		return
	}
	if dst.CanAddr() {
		addr := dst.UnsafeAddr()
		h := 17 * addr
		seen := visited[h]
		typ := dst.Type()
		for p := seen; p != nil; p = p.next {
			if p.ptr == addr && p.typ == typ {
				return nil
			}
		}
		// Remember, remember...
		visited[h] = &visit{addr, typ, seen}
	}

	if config.Transformers != nil && !isEmptyValue(dst) {
		if fn := config.Transformers.Transformer(dst.Type()); fn != nil {
			err = fn(dst, src)
			return
		}
	}

	switch dst.Kind() {
	case reflect.Struct:
		if hasExportedField(dst) {
			for i, n := 0, dst.NumField(); i < n; i++ {
				if err = deepMerge(dst.Field(i), src.Field(i), visited, depth+1, config); err != nil {
					return
				}
			}
		} else {
			if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
				dst.Set(src)
			}
		}
	case reflect.Map:
		if dst.IsNil() && !src.IsNil() {
			dst.Set(reflect.MakeMap(dst.Type()))
		}
		for _, key := range src.MapKeys() {
			srcElement := src.MapIndex(key)
			if !srcElement.IsValid() {
				continue
			}
			dstElement := dst.MapIndex(key)
			switch srcElement.Kind() {
			case reflect.Chan, reflect.Func, reflect.Map, reflect.Interface, reflect.Slice:
				if srcElement.IsNil() {
					continue
				}
				fallthrough
			default:
				if !srcElement.CanInterface() {
					continue
				}
				switch reflect.TypeOf(srcElement.Interface()).Kind() {
				case reflect.Struct:
					fallthrough
				case reflect.Ptr:
					fallthrough
				case reflect.Map:
					srcMapElm := srcElement
					dstMapElm := dstElement
					if srcMapElm.CanInterface() {
						srcMapElm = reflect.ValueOf(srcMapElm.Interface())
						if dstMapElm.IsValid() {
							dstMapElm = reflect.ValueOf(dstMapElm.Interface())
						}
					}
					if err = deepMerge(dstMapElm, srcMapElm, visited, depth+1, config); err != nil {
						return
					}
				case reflect.Slice:
					srcSlice := reflect.ValueOf(srcElement.Interface())

					var dstSlice reflect.Value
					if !dstElement.IsValid() || dstElement.IsNil() {
						dstSlice = reflect.MakeSlice(srcSlice.Type(), 0, srcSlice.Len())
					} else {
						dstSlice = reflect.ValueOf(dstElement.Interface())
					}

					if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
						dstSlice = srcSlice
					} else if config.AppendSlice {
						if srcSlice.Type() != dstSlice.Type() {
							return fmt.Errorf("cannot append two slice with different type (%s, %s)", srcSlice.Type(), dstSlice.Type())
						}
    
func deepMerge(dst, src reflect.Value, visited map[uintptr]*visit, depth int, config *Config) (err error) {
	overwrite := config.Overwrite

	if !src.IsValid() {
		return
	}
	if dst.CanAddr() {
		addr := dst.UnsafeAddr()
		h := 17 * addr
		seen := visited[h]
		typ := dst.Type()
		for p := seen; p != nil; p = p.next {
			if p.ptr == addr && p.typ == typ {
				return nil
			}
		}
		// Remember, remember...
		visited[h] = &visit{addr, typ, seen}
	}

	if config.Transformers != nil && !isEmptyValue(dst) {
		if fn := config.Transformers.Transformer(dst.Type()); fn != nil {
			err = fn(dst, src)
			return
		}
	}

	switch dst.Kind() {
	case reflect.Struct:
		if hasExportedField(dst) {
			for i, n := 0, dst.NumField(); i < n; i++ {
				if err = deepMerge(dst.Field(i), src.Field(i), visited, depth+1, config); err != nil {
					return
				}
			}
		} else {
			if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
				dst.Set(src)
			}
		}
	case reflect.Map:
		if dst.IsNil() && !src.IsNil() {
			dst.Set(reflect.MakeMap(dst.Type()))
		}
		for _, key := range src.MapKeys() {
			srcElement := src.MapIndex(key)
			if !srcElement.IsValid() {
				continue
			}
			dstElement := dst.MapIndex(key)
			switch srcElement.Kind() {
			case reflect.Chan, reflect.Func, reflect.Map, reflect.Interface, reflect.Slice:
				if srcElement.IsNil() {
					continue
				}
				fallthrough
			default:
				if !srcElement.CanInterface() {
					continue
				}
				switch reflect.TypeOf(srcElement.Interface()).Kind() {
				case reflect.Struct:
					fallthrough
				case reflect.Ptr:
					fallthrough
				case reflect.Map:
					srcMapElm := srcElement
					dstMapElm := dstElement
					if srcMapElm.CanInterface() {
						srcMapElm = reflect.ValueOf(srcMapElm.Interface())
						if dstMapElm.IsValid() {
							dstMapElm = reflect.ValueOf(dstMapElm.Interface())
						}
					}
					if err = deepMerge(dstMapElm, srcMapElm, visited, depth+1, config); err != nil {
						return
					}
				case reflect.Slice:
					srcSlice := reflect.ValueOf(srcElement.Interface())

					var dstSlice reflect.Value
					if !dstElement.IsValid() || dstElement.IsNil() {
						dstSlice = reflect.MakeSlice(srcSlice.Type(), 0, srcSlice.Len())
					} else {
						dstSlice = reflect.ValueOf(dstElement.Interface())
					}

					if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
						dstSlice = srcSlice
					} else if config.AppendSlice {
						if srcSlice.Type() != dstSlice.Type() {
							return fmt.Errorf("cannot append two slice with different type (%s, %s)", srcSlice.Type(), dstSlice.Type())
						}
						dstSlice = reflect.AppendSlice(dstSlice, srcSlice)
					}
					dst.SetMapIndex(key, dstSlice)
				}
			}
			if dstElement.IsValid() && reflect.TypeOf(srcElement.Interface()).Kind() == reflect.Map {
				continue
			}

			if srcElement.IsValid() && (overwrite || (!dstElement.IsValid() || isEmptyValue(dstElement))) {
				if dst.IsNil() {
					dst.Set(reflect.MakeMap(dst.Type()))
				}
				dst.SetMapIndex(key, srcElement)
			}
		}
	case reflect.Slice:
		if !dst.CanSet() {
			break
		}
		if !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) && !config.AppendSlice {
			dst.Set(src)
		} else if config.AppendSlice {
			if src.Type() != dst.Type() {
				return fmt.Errorf("cannot append two slice with different type (%s, %s)", src.Type(), dst.Type())
			}
			dst.Set(reflect.AppendSlice(dst, src))
		}
	case reflect.Ptr:
		fallthrough
	case reflect.Interface:
		if src.IsNil() {
			break
		}
		if src.Kind() != reflect.Interface {
			if dst.IsNil() || overwrite {
				if dst.CanSet() && (overwrite || isEmptyValue(dst)) {
					dst.Set(src)
				}
			} else if src.Kind() == reflect.Ptr {
				if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil {
					return
				}
			} else if dst.Elem().Type() == src.Type() {
				if err = deepMerge(dst.Elem(), src, visited, depth+1, config); err != nil {
					return
				}
			} else {
				return ErrDifferentArgumentsTypes
			}
			break
		}
		if dst.IsNil() || overwrite {
			if dst.CanSet() && (overwrite || isEmptyValue(dst)) {
				dst.Set(src)
			}
		} else if err = deepMerge(dst.Elem(), src.Elem(), visited, depth+1, config); err != nil {
			return
		}
	default:
		if dst.CanSet() && !isEmptyValue(src) && (overwrite || isEmptyValue(dst)) {
			dst.Set(src)
		}
	}
	return
}