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: model.go
    path of file: ./repos/scan4all/vendor/go.uber.org/mock/mockgen/model
    
    the code of the file until where you have to start completion: // Copyright 2012 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Package model contains the data model necessary for generating mock implementations.
package model

import (
	"encoding/gob"
	"fmt"
	"io"
	"reflect"
	"strings"
)

// pkgPath is the importable path for package model
const pkgPath = "go.uber.org/mock/mockgen/model"

// Package is a Go package. It may be a subset.
type Package struct {
	Name       string
	PkgPath    string
	Interfaces []*Interface
	DotImports []string
}

// Print writes the package name and its exported interfaces.
func (pkg *Package) Print(w io.Writer) {
	_, _ = fmt.Fprintf(w, "package %s\n", pkg.Name)
	for _, intf := range pkg.Interfaces {
		intf.Print(w)
	}
}

// Imports returns the imports needed by the Package as a set of import paths.
func (pkg *Package) Imports() map[string]bool {
	im := make(map[string]bool)
	for _, intf := range pkg.Interfaces {
		intf.addImports(im)
		fo
    
func typeFromType(t reflect.Type) (Type, error) {
	// Hack workaround for https://golang.org/issue/3853.
	// This explicit check should not be necessary.
	if t == byteType {
		return PredeclaredType("byte"), nil
	}

	if imp := t.PkgPath(); imp != "" {
		return &NamedType{
			Package: impPath(imp),
			Type:    t.Name(),
		}, nil
	}

	// only unnamed or predeclared types after here

	// Lots of types have element types. Let's do the parsing and error checking for all of them.
	var elemType Type
	switch t.Kind() {
	case reflect.Array, reflect.Chan, reflect.Map, reflect.Ptr, reflect.Slice:
		var err error
		elemType, err = typeFromType(t.Elem())
		if err != nil {
			return nil, err
		}
	}

	switch t.Kind() {
	case reflect.Array:
		return &ArrayType{
			Len:  t.Len(),
			Type: elemType,
		}, nil
	case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr,
		reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128, reflect.String:
		return PredeclaredType(t.Kind().String()), nil
	case reflect.Chan:
		var dir ChanDir
		switch t.ChanDir() {
		case reflect.RecvDir:
			dir = RecvDir
		case reflect.SendDir:
			dir = SendDir
		}
		return &ChanType{
			Dir:  dir,
			Type: elemType,
		}, nil
	case reflect.Func:
		in, variadic, out, err := funcArgsFromType(t)
		if err != nil {
			return nil, err
		}
		return &FuncType{
			In:       in,
			Out:      out,
			Variadic: variadic,
		}, nil
	case reflect.Interface:
		// Two special interfaces.
		if t.NumMethod() == 0 {
			return PredeclaredType("any"), nil
		}
		if t == errorType {
			return PredeclaredType("error"), nil
		}
	case reflect.Map:
		kt, err := typeFromType(t.Key())
		if err != nil {
			return nil, err
		}
		return &MapType{
			Key:   kt,
			Value: elemType,
		}, nil
	case reflect.Ptr:
		return &PointerType{
			Type: elemType,
		}, nil
	case reflect.Slice:
		return &ArrayType{
			Len:  -1,
			Type: elemType,
		}, nil
	case reflect.Struct:
		if t.NumField() == 0 {
			return PredeclaredType("struct{}"), nil
		}
	}

	// TODO: Struct, UnsafePointer
	return nil, fmt.Errorf("can't yet turn %v (%v) into a model.Type", t, t.Kind())
}