nl_tokens: Remove a previously installed event handler
pl_tokens: function ( eventName , handler ) { this . _validateEvent ( eventName ) ; var hl = this . _handlers [ eventName ] . length ; for ( var i = 0 ; i < hl ; i ++ ) { if ( this . _handlers [ eventName ] [ i ] === <mask> ) { this . _handlers [ eventName ] . splice ( i , 1 ) ; return ; } } }