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: flatten_options.go
    path of file: ./repos/hubble-ui/backend/vendor/github.com/go-openapi/analysis
    
    the code of the file until where you have to start completion: package analysis

import (
	"log"

	"github.com/go-openapi/spec"
)

// FlattenOpts configuration for flattening a swagger specification.
//
// The BasePath parameter is used to locate remote relative $ref found in the specification.
// This path is a file: it points to the location of the root document and may be either a local
// file path or a URL.
//
// If none specified, relative references (e.g. "$ref": "folder/schema.yaml#/definitions/...")
// found in the spec are searched from the current working directory.
type FlattenOpts struct {
	Spec           *Spec    // The analyzed spec to work with
	flattenContext *conte
    
func (f *FlattenOpts) croak() {
	if !f.Verbose {
		return
	}

	reported := make(map[string]bool, len(f.flattenContext.newRefs))
	for _, v := range f.Spec.references.allRefs {
		// warns about duplicate handling
		for _, r := range f.flattenContext.newRefs {
			if r.isOAIGen && r.path == v.String() {
				reported[r.newName] = true
			}
		}
	}

	for k := range reported {
		log.Printf("warning: duplicate flattened definition name resolved as %s", k)
	}

	// warns about possible type mismatches
	uniqueMsg := make(map[string]bool)
	for _, msg := range f.flattenContext.warnings {
		if _, ok := uniqueMsg[msg]; ok {
			continue
		}
		log.Printf("warning: %s", msg)
		uniqueMsg[msg] = true
	}
}