code: def is_variadic(val):
      return issubclass(type(val), sm.Symbol) and val.name[0] == "*"
  
file_path: coremltools/coremltools/converters/mil/mil/types/symbolic.py
imports: import numpy
  import sympy
label_desc: Use image node_id 3 for calling a global function with example usage: is_variadic(val) and returns: unknown