Adds value to the current value of the key, if both the current value and value are arrays then value will be appended to the current value.
value
Readonly
A value for the operation to apply against the current data storage value.
DataStorageOperation for all possible operation subtypes.
Adds
valueto the current value of the key, if both the current value andvalueare arrays thenvaluewill be appended to the current value.