fnMapProperty = function(sKey, vValue, sPath) {
			var sNewPath = sPath ? `${sPath}.${sKey}` : sKey;
			var iIndex = aValidFileProperties.indexOf(sNewPath);
			if (iIndex >= 0) {
				var sPropertyName = Object.keys(oMappingInfo)[iIndex];
				mPropertyMap[sPropertyName] = vValue;
			} else if (isPlainObject(vValue)) {
				Object.entries(vValue).forEach(function(aEntry) {
					fnMapProperty(aEntry[0], aEntry[1], sNewPath);
				});
			}
		}
Converts the file content to the properties of the flex object according to the mapping info.
@param {object} oFileContent - File content
@param {object} oMappingInfo - Mapping info
@returns {object} Properties map to create a new flex object
@static