private static void showTemplateBuilder(PyFunction method, @NotNull final PsiFile file) {
    method = CodeInsightUtilCore.forcePsiPostprocessAndRestoreElement(method);

    final TemplateBuilder builder = TemplateBuilderFactory.getInstance().createTemplateBuilder(method);
    ParamHelper.walkDownParamArray(
      method.getParameterList().getParameters(),
      new ParamHelper.ParamVisitor() {
        @Override
        public void visitNamedParameter(PyNamedParameter param, boolean first, boolean last) {
          builder.replaceElement(param, param.getName());
        }
      }
    );

    // TODO: detect expected return type from call site context: PY-1863
    builder.replaceElement(method.getStatementList(), "return None");
    PythonTemplateRunner.runTemplate(file, builder);
  }
private static void showTemplateBuilder(PyFunction method, @NotNull final PsiFile file)