avoid_final_parameters

Parameters should not be marked as 'final'.

The analyzer produces this diagnostic when a parameter declaration is marked with the final keyword.

The following code produces this diagnostic because the parameter a is marked as final:

void f(final String a) {
  print(a);
}

The following code produces this diagnostic because the closure parameter a is marked as final:

var f = (final int a) => print(a);

Remove the final keyword from the parameter declaration:

void f(String a) {
  print(a);
}

var f = (int a) => print(a);