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: imports.go
    path of file: ./repos/gccrs/libgo/go/golang.org/x/tools/go/analysis/internal/facts
    
    the code of the file until where you have to start completion: // Copyright 2018 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.

package facts

import (
	"go/types"

	"golang.org/x/tools/internal/typeparams"
)

// importMap computes the import map for a package by traversing the
// entire exported API each of its imports.
//
// This is a workaround for the fact that we cannot access the map used
// internally by the types.Importer returned by go/importer. The entries
// in this map are th
    
func importMap(imports []*types.Package) map[string]*types.Package {
	objects := make(map[types.Object]bool)
	packages := make(map[string]*types.Package)

	var addObj func(obj types.Object) bool
	var addType func(T types.Type)

	addObj = func(obj types.Object) bool {
		if !objects[obj] {
			objects[obj] = true
			addType(obj.Type())
			if pkg := obj.Pkg(); pkg != nil {
				packages[pkg.Path()] = pkg
			}
			return true
		}
		return false
	}

	addType = func(T types.Type) {
		switch T := T.(type) {
		case *types.Basic:
			// nop
		case *types.Named:
			if addObj(T.Obj()) {
				// TODO(taking): Investigate why the Underlying type is not added here.
				for i := 0; i < T.NumMethods(); i++ {
					addObj(T.Method(i))
				}
				if tparams := typeparams.ForNamed(T); tparams != nil {
					for i := 0; i < tparams.Len(); i++ {
						addType(tparams.At(i))
					}
				}
				if targs := typeparams.NamedTypeArgs(T); targs != nil {
					for i := 0; i < targs.Len(); i++ {
						addType(targs.At(i))
					}
				}
			}
		case *types.Pointer:
			addType(T.Elem())
		case *types.Slice:
			addType(T.Elem())
		case *types.Array:
			addType(T.Elem())
		case *types.Chan:
			addType(T.Elem())
		case *types.Map:
			addType(T.Key())
			addType(T.Elem())
		case *types.Signature:
			addType(T.Params())
			addType(T.Results())
			if tparams := typeparams.ForSignature(T); tparams != nil {
				for i := 0; i < tparams.Len(); i++ {
					addType(tparams.At(i))
				}
			}
		case *types.Struct:
			for i := 0; i < T.NumFields(); i++ {
				addObj(T.Field(i))
			}
		case *types.Tuple:
			for i := 0; i < T.Len(); i++ {
				addObj(T.At(i))
			}
		case *types.Interface:
			for i := 0; i < T.NumMethods(); i++ {
				addObj(T.Method(i))
			}
			for i := 0; i < T.NumEmbeddeds(); i++ {
				addType(T.EmbeddedType(i)) // walk Embedded for implicits
			}
		case *typeparams.Union:
			for i := 0; i < T.Len(); i++ {
				addType(T.Term(i).Type())
			}
		case *typeparams.TypeParam:
			if addObj(T.Obj()) {
				addType(T.Constraint())
			}
		}
	}

	for _, imp := range imports {
		packages[imp.Path()] = imp

		scope := imp.Scope()
		for _, name := range scope.Names() {
			addObj(scope.Lookup(name))
		}
	}

	return packages
}