code: def unmatched_cases(match, mod=None):
      """
      Finds cases that the match expression does not catch, if any.
  
      Parameters
      ----------
      match : tvm.relay.Match
          The match expression
  
      mod : Optional[tvm.IRModule]
          The module (defaults to an empty module)
  
      Returns
      -------
      missing_patterns : [tvm.relay.Pattern]
          Patterns that the match expression does not catch.
      """
      return _ffi_api.unmatched_cases(match, mod)
  
imports: from ...ir import IRModule
  from ...relay import transform, build_module
  from ...runtime.ndarray import cpu
  from .None import _ffi_api
  from .feature import Feature
label_desc: Use image node_id 14 for calling a global function with example usage: unmatched_cases(match, mod) and returns: _ffi_api