private static boolean isSingleCallTail(List<PsiStatement> tail) {
      if (tail.size() != 1) return false;
      PsiExpressionStatement expressionStatement = tryCast(tail.get(0), PsiExpressionStatement.class);
      if (expressionStatement == null) return false;
      PsiMethodCallExpression call = tryCast(expressionStatement.getExpression(), PsiMethodCallExpression.class);
      return call != null;
    }
private static boolean isSingleCallTail(List<PsiStatement> tail)