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: bimport.go
    path of file: ./repos/faasd/vendor/golang.org/x/tools/internal/gcimporter
    
    the code of the file until where you have to start completion: // Copyright 2015 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.

// This file contains the remaining vestiges of
// $GOROOT/src/go/internal/gcimporter/bimport.go.

package gcimporter

import (
	"fmt"
	"go/token"
	"go/types"
	"sync"
)

func errorf(format string, args ...interface{}) {
	panic(fmt.Sprintf(format, args...))
}

const deltaNewFile = -64 // see cmd/compile/internal/gc/bexport.go

// Synthesi
    
func (s *fakeFileSet) pos(file string, line, column int) token.Pos {
	// TODO(mdempsky): Make use of column.

	// Since we don't know the set of needed file positions, we reserve maxlines
	// positions per file. We delay calling token.File.SetLines until all
	// positions have been calculated (by way of fakeFileSet.setLines), so that
	// we can avoid setting unnecessary lines. See also golang/go#46586.
	f := s.files[file]
	if f == nil {
		f = &fileInfo{file: s.fset.AddFile(file, -1, maxlines)}
		s.files[file] = f
	}
	if line > maxlines {
		line = 1
	}
	if line > f.lastline {
		f.lastline = line
	}

	// Return a fake position assuming that f.file consists only of newlines.
	return token.Pos(f.file.Base() + line - 1)
}