code: function() {
  			var sPeerParamPropName = null;
  			if (this._oLowerIntervalBoundaryParameterProperty) {
  				sPeerParamPropName = this._oLowerIntervalBoundaryParameterProperty.name;
  			} else {
  				sPeerParamPropName = this._oUpperIntervalBoundaryParameterProperty.name;
  			}
  			if (!sPeerParamPropName) {
  				throw "Parameter is not an interval boundary";
  			}
  			return this._oParameterization.findParameterByName(sPeerParamPropName);
  		}
docs: Get property for the parameter representing the peer boundary of the same
  interval
  
  @returns {sap.ui.model.analytics.odata4analytics.Parameter} The parameter representing
  the peer boundary of the same interval. This means that if
  *this* parameter is a lower boundary, the returned object
  @public
  @function
  @name sap.ui.model.analytics.odata4analytics.Parameter#getPeerIntervalBoundaryParameter