use_setters_to_change_properties    
              
Use a setter for operations that conceptually change a property.
Details
#DO use a setter for operations that conceptually change a property.
BAD:
dart
rectangle.setWidth(3);
button.setVisible(false);GOOD:
dart
rectangle.width = 3;
button.visible = false;
Enable
#To enable the use_setters_to_change_properties rule,
add use_setters_to_change_properties under linter > rules in your
analysis_options.yaml file:
analysis_options.yaml
yaml
linter:
  rules:
    - use_setters_to_change_propertiesIf you're instead using the YAML map syntax to configure linter rules,
add use_setters_to_change_properties: true under linter > rules:
analysis_options.yaml
yaml
linter:
  rules:
    use_setters_to_change_properties: true