@startuml
!include <material/transfer>

left to right direction
skinparam defaultTextAlignment center

rectangle "<$ma_transfer>\nSimple Queue" as block #DeepSkyBlue

interface " " as q1
interface " " as q2
interface " " as q3
interface " " as q4
interface " " as q5
interface " " as q6
interface " " as q7

q1 --> block: enqueue
q2 --> block: requestdequeue
q3 --> block: requestrenege
q4 --> block: dr
block --> q5: dequeue
block --> q6: renege
block --> q7: overflow
@enduml
