code: function (oChange, aActiveContexts) {
  			var sChangeContext = oChange.context || "";
  
  			if (!sChangeContext) {
  				// change is free of context (always applied)
  				return true;
  			}
  
  			return aActiveContexts && aActiveContexts.indexOf(sChangeContext) !== -1;
  		}
docs: Helper to check if a passed change is free of contexts or in a matching context.
  
  @param {sap.ui.fl.Change} oChange - change object which has to be filtered
  @param {sap.ui.fl.Context[]} aActiveContexts - active runtime or designtime context
  @returns {boolean} is change context free or has a valid context