src/sap.ui.core/src/sap/ui/base/ExpressionParser.js
function PROPERTY_ACCESS(fnLeft, fnName, aParts, oReference) {
		var oParent = fnLeft(aParts),
			sIdentifier = fnName(aParts), // BEWARE: evaluate propertyNameValue AFTER baseValue!
			vChild = oParent[sIdentifier];

		if (oReference) {
			oReference.base = oParent;
		}
		return vChild;
	}
function PROPERTY_ACCESS(fnLeft, fnName, aParts, oReference) {
		var oParent = fnLeft(aParts),
			sIdentifier = fnName(aParts), // BEWARE: evaluate propertyNameValue AFTER baseValue!
			vChild = oParent[sIdentifier];

		if (oReference) {
			oReference.base = oParent;
		}
		return vChild;
	}
function PROPERTY_ACCESS ( fnLeft , fnName , aParts , oReference ) { var oParent = fnLeft ( aParts ) , sIdentifier = fnName ( aParts ) , // BEWARE: evaluate propertyNameValue AFTER baseValue! vChild = oParent [ sIdentifier ] ; if ( oReference ) { oReference . base = oParent ; } return vChild ; }
Formatter function for a property access.
@param {function} fnLeft - formatter function for the left operand: the array or object to
access
@param {function} fnName - formatter function for the property name
@param {any[]} aParts - the array of binding values
@param {object} [oReference]
optional side channel to return the base value (left operand) of the reference
@return {any} - the array element or object property
Formatter function for a property access .