@Override
  public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
    final PyParameter psi = PyUtil.as(descriptor.getPsiElement(), PyParameter.class);
    assert psi != null;
    final PyCallableParameter parameter = PyCallableParameterImpl.psi(psi);
    final TypeEvalContext ctx = TypeEvalContext.codeAnalysis(project, psi.getContainingFile());

    final PyFunction function = PsiTreeUtil.getParentOfType(psi, PyFunction.class);
    if (function != null) {
      final PyResolveContext resolveContext = PyResolveContext.defaultContext(ctx);

      StreamEx
        .of(PyPsiIndexUtil.findUsages(function, false))
        .map(UsageInfo::getElement)
        .nonNull()
        .map(PsiElement::getParent)
        .select(PyCallExpression.class)
        .flatCollection(callExpression -> callExpression.multiMapArguments(resolveContext))
        .flatCollection(mapping -> mapping.getMappedParameters().entrySet())
        .filter(entry -> parameter.equals(entry.getValue()))
        .forEach(entry -> entry.getKey().delete());

      final PyStringLiteralExpression docStringExpression = function.getDocStringExpression();
      final String parameterName = parameter.getName();
      if (docStringExpression != null && parameterName != null) {
        PyDocstringGenerator.forDocStringOwner(function).withoutParam(parameterName).buildAndInsert();
      }

      if (parameterName != null) {
        StreamEx
          .of(PyiUtil.getOverloads(function, ctx))
          .map(overload -> overload.getParameterList().getParameters())
          .map(parameters -> ContainerUtil.find(parameters, overloadParameter -> parameterName.equals(overloadParameter.getName())))
          .nonNull()
          .forEach(PsiElement::delete);
      }
    }

    psi.delete();
  }
@Override
  public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor)