attachValidationError(fnFunction, oListener?): sap.ui.core.Core
Attach event-handler fnFunction to the 'validationError' event of sap.ui.core.Core.
Parameters:
| {function} | fnFunction | The function to call, when the event occurs. This function will be called on the oListener-instance (if present) or in a 'static way'. |
| {object} | oListener?, Default: | Object on which to call the given function. If empty, this Model is used. |
Returns:
| {sap.ui.core.Core} | this to allow method chaining |