UnsupportedError class Null safety
The operation was not allowed by the object.
This Error is thrown when an instance cannot implement one of the methods in its signature.
- hashCode → int
The hash code for this object. [...]
- message → String?
- runtimeType → Type
A representation of the runtime type of the object.
- stackTrace → StackTrace?
The stack trace at the point where this error was first thrown. [...]