@NotNull
  public static Collection<PsiMethod> collectClassStaticMethodsIntern(@NotNull PsiClass psiClass) {
    final Collection<PsiMethod> psiMethods = collectClassMethodsIntern(psiClass);
    return ContainerUtil.filter(psiMethods, psiMethod -> psiMethod.hasModifierProperty(PsiModifier.STATIC));
  }
@NotNull
  public static Collection<PsiMethod> collectClassStaticMethodsIntern(@NotNull PsiClass psiClass)