perform

  The perform message sends a specified message to the target object.
  The message to be sent is specified by an object of class Symbol. A Symbol
  object must be the first parameter to the perform message. All
  following parameters are passed to the invoked method as is.

  For example, the following code fragment creates a Symbol object referring
  to the move message and sends it to the object obj, using the perform
  message.

    LOCAL oSym := Symbol():new( "move" )
    obj:perform( oSym, 15 )

  This has the effect of sending the move message to obj. The second
  parameter passed to perform above, 15, will be passed to the move
  method as its first parameter.