avoid_print

Don't invoke 'print' in production code.

The analyzer produces this diagnostic when the function print is invoked in production code.

The following code produces this diagnostic because the function print can't be invoked in production:

void f(int x) {
  print('x = $x');
}

If you're writing code that uses Flutter, then use the function debugPrint, guarded by a test using kDebugMode:

import 'package:flutter/foundation.dart';

void f(int x) {
  if (kDebugMode) {
    debugPrint('x = $x');
  }
}

If you're writing code that doesn't use Flutter, then use a logging service, such as package:logging, to write the information.