avoid_unused_constructor_parameters

Avoid defining unused parameters in constructors.

This rule is available as of Dart 2.0.0.

This rule has a quick fix available.

AVOID defining unused parameters in constructors.

BAD:

class BadOne {
  BadOne(int unusedParameter, [String unusedPositional]);
}

class BadTwo {
  int c;

  BadTwo(int a, int b, int x) {
    c = a + b;
  }
}

To enable the avoid_unused_constructor_parameters rule, add avoid_unused_constructor_parameters under linter > rules in your analysis_options.yaml file:

linter:
  rules:
    - avoid_unused_constructor_parameters