code: function mergeDefinitionSource(mDefinitions, mDefinitionSource, mSourceData, oSource) {
  		if (mSourceData) {
  			for (var sName in mDefinitions) {
  				if (!mDefinitionSource[sName] && mSourceData[sName] && mSourceData[sName].uri) {
  					mDefinitionSource[sName] = oSource;
  				}
  			}
  		}
  	}
docs: Utility function which merges a map of property definitions to track
  from which "source" a property was defined.
  
  This function is used to find out which Component has defined
  which "dataSource/model".
  
  @param {object} mDefinitions Map with definitions to check
  @param {object} mDefinitionSource Object to extend with definition - source mapping
  @param {object} mSourceData Actual map with definitions
  @param {object} oSource Corresponding source object which should be assigned to the definitions-source map
  @private