code: function (sDetails) {
  				MessageBox.error(
  					this._sErrorText,
  					{
  						id : "metadataErrorMessageBox",
  						details : sDetails,
  						styleClass : this._oComponent.getContentDensityClass(),
  						actions : [MessageBox.Action.RETRY, MessageBox.Action.CLOSE],
  						onClose : function (sAction) {
  							if (sAction === MessageBox.Action.RETRY) {
  								this._oModel.refreshMetadata();
  							}
  						}.bind(this)
  					}
  				);
  			}
docs: Shows a {@link sap.m.MessageBox} when the metadata call has failed.
  The user can try to refresh the metadata.
  @param {string} sDetails a technical error to be displayed on request
  @private