Frank Shearar uploaded a new version of Collections to project The Trunk:
http://source.squeak.org/trunk/Collections-fbs.490.mcz

==================== Summary ====================

Name: Collections-fbs.490
Author: fbs
Time: 26 August 2012, 8:45:14.33 pm
UUID: 2929bdcf-a718-4a23-a745-dfb308741c51
Ancestors: Collections-ul.488

Symbol >> #isBinary returns true if that Symbol is a valid binary message - something like #+, #>>=, and so on. It returns false for all other kinds of Symbols.

=============== Diff against Collections-ul.488 ===============

Item was added:
+ ----- Method: Symbol>>isBinary (in category 'testing') -----
+ isBinary
+ 	^ self isInfix.!