code: def _accept(prefix):
      return (
          len(prefix) >= 8
          and i32(prefix[:4]) >= 20
          and i32(prefix[4:8]) in (1, 2)
      )
  
imports: from .None import Image, ImageFile
  from ._binary import i32be
label_desc: Use image node_id 1 for calling a global function with example usage: _accept(prefix) and returns: unknown