code: def may_contain_header(klass, binaryblock):
      return binaryblock[:4] == b"\211HDF"
  
imports: import warnings
  import numpy
  from .minc1 import Minc1File, Minc1Image, MincError, MincHeader
label_desc: Use image node_id 1 for calling the Minc2Header obj's underlying member method code with example usage: obj.may_contain_header(klass, binaryblock) and returns: unknown