class_docstr: Warmup + InverseSqrt decay scheduler.
  
  Args:
      noam_warmup (int): number of warmup iterations.
class_docstr_tok: ["Warmup","+","InverseSqrt","decay","scheduler",".","Args",":","noam_warmup","(","int",")",":","number","of","warmup","iterations","."]
docstr: Add scheduler args.
docstr_tok: ["Add","scheduler","args","."]
code: def _add_arguments(parser: _PrefixParser):
      """Add scheduler args."""
      parser.add_argument(
          "--warmup",
          type=int,
          default=1000,
          help="Number of warmup iterations.",
      )
  
imports: import argparse
  from espnet.utils.dynamic_import import dynamic_import
  from espnet.utils.fill_missing_args import fill_missing_args
label_desc: Use image node_id 1 for calling the NoamScheduler obj's underlying member method code with example usage: obj._add_arguments(parser) without return types