code: public ModifierAdjustment withFieldModifiers(ElementMatcher<? super FieldDescription.InDefinedShape> matcher,
                                                   List<? extends ModifierContributor.ForField> modifierContributors) {
          return new ModifierAdjustment(typeAdjustments, CompoundList.of(new Adjustment<FieldDescription.InDefinedShape>(matcher,
                  ModifierContributor.Resolver.of(modifierContributors)), fieldAdjustments), methodAdjustments);
      }
docs: Adjusts a field's modifiers if it fulfills the supplied matcher.
  
  @param matcher              The matcher that determines if a field's modifiers should be adjusted.
  @param modifierContributors The modifier contributors to enforce.
  @return A new modifier adjustment that enforces the given modifier contributors and any previous adjustments.