Try removing the declaration of '_accountManagerSubscription'. See https://dart.dev/diagnostics/unused_element to learn more about this problem.

Try using 'TextElementStyle.kMonospace'. See https://dart.dev/lints/use_named_constants to learn more about this problem.

Guard a 'State.context' use with a 'mounted' check on the State, and other BuildContext use with a 'mounted' check on the BuildContext. See https://dart.dev/lints/use_build_context_synchronously to learn more about this problem.

Try removing the declaration of '_buildViewLandscape'. See https://dart.dev/diagnostics/unused_element to learn more about this problem.

Try using a logging framework. See https://dart.dev/lints/avoid_print to learn more about this problem.

Try adding a dependency for 'material_color_utilities' in the 'pubspec.yaml' file. See https://dart.dev/lints/depend_on_referenced_packages to learn more about this problem.

Try removing the declaration of '_RepeatButton.infer'. See https://dart.dev/diagnostics/unused_element to learn more about this problem.

Try rewriting the code to not use the 'BuildContext', or guard the use with a 'mounted' check. See https://dart.dev/lints/use_build_context_synchronously to learn more about this problem.

Try rewriting the code to not use the 'BuildContext', or guard the use with a 'mounted' check. See https://dart.dev/lints/use_build_context_synchronously to learn more about this problem.