Symbol is an element in some model, e.g. language model or framework model.
Lifecycle
The Symbol instance is expected to stay valid within a single read action,
which means it's safe to pass the instance to different APIs.
Symbol instance should not be referenced between read actions.
Please use
Pointer's
dereference
to obtain new Symbol instance (or the same instance if it's still valid)
in the next read action.
Equality
There are no restrictions on whether implementations must provide
#equals/
#hashCode.