alreadyInitializedError top-level constant
An error thrown if a Notifier is associated multiple times with a provider.
Implementation
@internal
const alreadyInitializedError = '''
A NotifierProvider returned a Notifier instance that is already associated
with another provider.
To fix, do not reuse the same Notifier instance multiple times.
NotifierProviders are expected to always create a new Notifier instance.
''';