code: def may_contain_header(klass, binaryblock):
      return binaryblock[:4] == b"CDF\x01"
  
imports: from __future__ import annotations
  from numbers import Integral
  import numpy
  from .externals.netcdf import netcdf_file
  from .fileslice import canonical_slicers
  from .spatialimages import SpatialHeader, SpatialImage
label_desc: Use image node_id 1 for calling the Minc1Header obj's underlying member method code with example usage: obj.may_contain_header(klass, binaryblock) and returns: unknown