can-stache-key.js
function(value, i, reads, options) {
				return value && value[getValueSymbol] && value[isValueLikeSymbol] !== false && (options.foundAt || !isAt(i, reads) );
			}
function(value, i, reads, options) {
				return value && value[getValueSymbol] && value[isValueLikeSymbol] !== false && (options.foundAt || !isAt(i, reads) );
			}
function ( value , i , reads , options ) { return value && value [ getValueSymbol ] && value [ isValueLikeSymbol ] !== false && ( options . foundAt || ! isAt ( i , reads ) ) ; }
compute value reader
compute value reader