docstr: Should fail because warmup_multiplier is outside 0..1
docstr_tok: ["Should","fail","because","warmup_multiplier","is","outside","0","..","1"]
code: def test_error(self):
      """Should fail because warmup_multiplier is outside 0..1"""
      net = SchedulerTestNet()
      optimizer = torch.optim.Adam(net.parameters(), lr=1.0)
      with self.assertRaises(ValueError):
          WarmupCosineSchedule(
              optimizer,
              warmup_steps=2,
              t_total=10,
              warmup_multiplier=-1,
          )
  
file_path: MONAI/tests/test_lr_scheduler.py
imports: from __future__ import annotations
  import unittest
  import torch
  from parameterized import parameterized
  from monai.optimizers.lr_scheduler import WarmupCosineSchedule
label_desc: Use image node_id 2 for calling the TestLRSCHEDULER obj's underlying member method code with example usage: obj.test_error() without return types