__meta.validationResult) meaning that it can be accessed programmatically.
executionOrderparameter that is specified when the event is registered.
preValidationCallbackevent onto the managed data layer array. This object takes the following form with 3 required options:
functionis a reference to a function declared prior -or- an inline function declaration.
eventMatchis a string that is interpreted as a regular expression.
executionOrderis an integer that allows control of excution when multiple callback functions are registered for the same event. Callbacks are processed from low to high executionOrder