Holds a collection of Ponder2 objects. An array may be returned from sending a message to an object or ir may be created in PonderTalk with the
#( obj1 obj2 obj3)syntax.
adds a aP2Object to the receiver
returns the P2Object at anIndex
for each entry in the array executes aBlock with the entry given as an argument to the block. Answers an array of answers from each execution of the block.
for each entry in the array executes aBlock with the entry given as an argument to the block. Answers the receiver