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: call.go
    path of file: ./repos/kubernetes/vendor/github.com/golang/mock/gomock
    
    the code of the file until where you have to start completion: // Copyright 2010 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-
    
func (c *Call) Return(rets ...interface{}) *Call {
	c.t.Helper()

	mt := c.methodType
	if len(rets) != mt.NumOut() {
		c.t.Fatalf("wrong number of arguments to Return for %T.%v: got %d, want %d [%s]",
			c.receiver, c.method, len(rets), mt.NumOut(), c.origin)
	}
	for i, ret := range rets {
		if got, want := reflect.TypeOf(ret), mt.Out(i); got == want {
			// Identical types; nothing to do.
		} else if got == nil {
			// Nil needs special handling.
			switch want.Kind() {
			case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
				// ok
			default:
				c.t.Fatalf("argument %d to Return for %T.%v is nil, but %v is not nillable [%s]",
					i, c.receiver, c.method, want, c.origin)
			}
		} else if got.AssignableTo(want) {
			// Assignable type relation. Make the assignment now so that the generated code
			// can return the values with a type assertion.
			v := reflect.New(want).Elem()
			v.Set(reflect.ValueOf(ret))
			rets[i] = v.Interface()
		} else {
			c.t.Fatalf("wrong type of argument %d to Return for %T.%v: %v is not assignable to %v [%s]",
				i, c.receiver, c.method, got, want, c.origin)
		}
	}

	c.addAction(func([]interface{}) []interface{} {
		return rets
	})

	return c
}