Property :: hasAccessKey - Does property have an access key
The function returns true, when an access key has been set for the property. Access keys are set for collection properties, when the property definition has got at least one index definition, i.e. the collection is ordered and/or unique.
When no access key is set for the property, the function returns false.
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false.