@Override
  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file) {
    PsiReferenceParameterList parameterList = PsiTreeUtil.findSameElementInCopy(myParameterList, file);
    PsiTypeParameter[] classTypeParameters = myClass.getTypeParameters();
    List<TypeParameterInfoView> parameters = createTypeParameters(JavaCodeFragmentFactory.getInstance(project),
                                                                  Arrays.asList(classTypeParameters),
                                                                  Arrays.asList(parameterList.getTypeParameterElements()));
    String className = "class " + myClass.getName();
    String originClassDeclaration = className + (classTypeParameters.length == 0 ? "" : "<" + StringUtil.join(classTypeParameters, p -> p.getName(), ",") + ">");
    String modifiedClassDeclaration = className + "<" + StringUtil.join(parameters, p -> p.getInfo().getName(classTypeParameters), ", ") + ">";
    return new IntentionPreviewInfo.CustomDiff(JavaFileType.INSTANCE, originClassDeclaration, modifiedClassDeclaration);
  }
@Override
  public @NotNull IntentionPreviewInfo generatePreview(@NotNull Project project, @NotNull Editor editor, @NotNull PsiFile file)