StateError class Null safety
The operation was not allowed by the current state of the object.
Should be used when this particular object is currently in a state
which doesn't support the requested operation, but other similar
objects might, or the object might change its state to one which
supports the operation.
Example: Asking for
list.first on a currently empty list.
If the operation is never supported, consider using
This is a generic error used for a variety of different erroneous actions. The message should be descriptive.
- StateError(String message)
- 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. [...]
Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
) → String
A string representation of this object. [...]
Object other) → bool
The equality operator. [...]