// Submitted by Zulfais <******@****.***>
co.bn

// Postman, Inc : https://postman.com
// Submitted by Rahul Dhawan <******@****.***>
postman-echo.com
pstmn.io
mock.pstmn.io
httpbin.org

// prequalifyme.today : https://prequalifyme.today
// Submitted by DeepakTiwari ******@****.***
prequalifyme.today

// prgmr.com : https://prgmr.com/

of an interface type or of elements of a composite type remains unchanged:
</p>

<pre>
// A Mutex is a data type with two methods, Lock and Unlock.
type Mutex struct         { /* Mutex fields */ }
func (m *Mutex) Lock()    { /* Lock implementation */ }
func (m *Mutex) Unlock()  { /* Unlock implementation */ }

// NewMutex has the same composition as Mutex but its method set is empty.