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: main.go
    path of file: ./repos/gitkube/vendor/golang.org/x/tools/cmd/guru/testdata/src/definition-json
    
    the code of the file until where you have to start completion: package definition

// Tests of 'definition' query, -json output.
// See golang.org/x/tools/cmd/guru/guru_test.go for explanation.
// See main.golden for expected query results.

// TODO(adonovan): test: selection of member of sam
    
func main() {
	var _ int // @definition builtin "int"

	var _ undef           // @definition lexical-undef "undef"
	var x lib.T           // @definition lexical-pkgname "lib"
	f()                   // @definition lexical-func "f"
	print(x)              // @definition lexical-var "x"
	if x := ""; x == "" { // @definition lexical-shadowing "x"
	}

	var _ lib.Type     // @definition qualified-type "Type"
	var _ lib.Func     // @definition qualified-func "Func"
	var _ lib.Var      // @definition qualified-var "Var"
	var _ lib.Const    // @definition qualified-const "Const"
	var _ lib2.Type    // @definition qualified-type-renaming "Type"
	var _ lib.Nonesuch // @definition qualified-nomember "Nonesuch"

	var u U
	print(u.field) // @definition select-field "field"
	u.method()     // @definition select-method "method"
}