nl_tokens: notify subscribers ( private helper )
pl_tokens: function ( subscribers , value ) { if ( ! subscribers ) return ; var subs = subscribers . slice ( ) ; for ( var i = 0 ; i < subs . length ; i ++ ) { if ( typeof subs [ i ] == "function" ) subs [ i ] ( value ) ; else if ( typeof subs [ i ] . call == "function" ) subs [ i ] . call ( <mask> ) ; else throw new TypeError ( "Observer is not callable." ) ; } }