Set ( )

[+] def addEntry ( x: T ) : Unit

[+] def apply ( x: T ) : Boolean

[+] def clear : Unit

[+] def contains ( x: T ) : Boolean

[+] def findEntry ( x: T ) : T

[+] def foreach ( f: T => U ) : Unit

[+] def iterator : Iterator [ T ]

[+] def toList : List [ A ]