The property key. This key is used internally only, but should be namespaced to avoid conflict with third-party extensions.
The stored value, if found; otherwise null.
The property key. This key is used internally only, but should be namespaced to avoid conflict with third-party extensions.
The property value. This can be any object that needs to be stored for future use.
The property key. This key is used internally only, but should be namespaced to avoid conflict with third-party extensions.
true if the value was removed; otherwise, false.