can-map.js
function(attr){
			if(!unobservable[attr] && !this._computedAttrs[attr]) {
				ObservationRecorder.add(this, attr);
			}
			return this.___get( attr );
		}
function(attr){
			if(!unobservable[attr] && !this._computedAttrs[attr]) {
				ObservationRecorder.add(this, attr);
			}
			return this.___get( attr );
		}
function ( attr ) { if ( ! unobservable [ attr ] && ! this . _computedAttrs [ attr ] ) { ObservationRecorder . add ( this , attr ) ; } return this . ___get ( attr ) ; }
### __get Signals `can.compute` that an observable property is being read.
### __get Signals can . compute that an observable property is being read .