Conditions that must be met for this operation to execute.
- hashCode → int
The hash code for this object. [...]
- ifGenerationMatch ↔ String
Only perform the composition if the generation of the source object that
would be used matches this value. If this value and a generation are both
specified, they must be the same value or the call will fail.
read / write
- runtimeType → Type
A representation of the runtime type of the object.