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: listing05.go
    path of file: ./repos/learning/golang/source_code/go-in-action-code/chapter10/listing05
    
    the code of the file until where you have to start completion: // Sample program demonstrating when implicit interface conversions
// are provided by the compiler.
package main

import "fmt"

// =============================================================================

// Mover provides support for moving things.
type Mover interface {
	Move()
}

// Locker provides support for locking and unlocking things.
type Locker interface {
	Lock()
	Unlock()
}

// MoveLocker provides support for moving and locking things.
type MoveLocker interface {
	Mover
	Locker
}

// =============================================================================

// bike represents a concrete type for the example.
type bike struct{}

// Move can change the position of a bike.
func (bike) Move() {
	fmt.Println("Moving the bike")
}

// Lock prevents a bike from moving.
func (bike) Lock() {
	fmt.Println("Locking the bike")
}

// Unlock allows a bike to be moved.
func (bike) Unlock() {
	fmt.Println("
    
func main() {

	// Declare variables of the MoveLocker and Mover interfaces set to their
	// zero value.
	var ml MoveLocker
	var m Mover

	// Create a value of type bike and assign the value to the MoveLocker
	// interface value.
	ml = bike{}

	// An interface value of type MoveLocker can be implicitly converted into
	// a value of type Mover. They both declare a method named move.
	m = ml

	// prog.go:65: cannot use m (type Mover) as type MoveLocker in assignment:
	//	   Mover does not implement MoveLocker (missing Lock method)
	ml = m

	// Interface type Mover does not declare methods named lock and unlock.
	// Therefore, the compiler can't perform an implicit conversion to assign
	// a value of interface type Mover to an interface value of type MoveLocker.
	// It is irrelevant that the concrete type value of type bike that is stored
	// inside of the Mover interface value implements the MoveLocker interface.

	// We can perform a type assertion at runtime to support the assignment.

	// Perform a type assertion against the Mover interface value to access
	// a COPY of the concrete type value of type bike that was stored inside
	// of it. Then assign the COPY of the concrete type to the MoveLocker
	// interface.
	b := m.(bike)
	ml = b
}