lib/abaaso.js
function ( obj ) {
		return obj ? observer.clisteners[observer.id( obj )] : array.keys( observer.clisteners ).length;
	}
function ( obj ) {
		return obj ? observer.clisteners[observer.id( obj )] : array.keys( observer.clisteners ).length;
	}
function ( obj ) { return obj ? observer . clisteners [ observer . id ( obj ) ] : array . keys ( observer . clisteners ) . length ; }
Returns the sum of active listeners for one or all Objects

@method sum
@param  {Mixed} obj [Optional] Entity
@return {Object}    Object with total listeners per event
Returns the sum of active listeners for one or all Objects