/**
	"Undefine" the variable specifed by 'name' (So that it tests == void).
	<p>
	<em>Note: there will be a better way to do this in the future.  This is 
	currently equivalent to doing namespace.setVariable(name, null);</em>
*/

bsh.help.unset = "usage: unset( name )";

void unset( String name ) {
	if ( arg == null )
		return;

	this.caller.namespace.setVariable(name, null);
}