class_docstr: Class for basic analyze header
  
  Implements zoom-only setting of affine transform, and no image
  scaling
class_docstr_tok: ["Class","for","basic","analyze","header","Implements","zoom-only","setting","of","affine","transform",",","and","no","image","scaling"]
code: def may_contain_header(klass, binaryblock):
      if len(binaryblock) < klass.sizeof_hdr:
          return False
  
      hdr_struct = np.ndarray(
          shape=(),
          dtype=header_dtype,
          buffer=binaryblock[: klass.sizeof_hdr],
      )
      bs_hdr_struct = hdr_struct.byteswap()
      return 348 in (
          hdr_struct["sizeof_hdr"],
          bs_hdr_struct["sizeof_hdr"],
      )
  
imports: from __future__ import annotations
  import numpy
  from .arrayproxy import ArrayProxy
  from .arraywriters import ArrayWriter, WriterError, get_slope_inter, make_array_writer
  from .batteryrunners import Report
  from .fileholders import copy_file_map
  from .spatialimages import HeaderDataError, HeaderTypeError, SpatialHeader, SpatialImage
  from .volumeutils import apply_read_scaling, array_from_file, make_dt_codes, native_code, seek_tell, shape_zoom_affine, swapped_code
  from .wrapstruct import LabeledWrapStruct
label_desc: Use image node_id 26 for calling the AnalyzeHeader obj's underlying member method code with example usage: obj.may_contain_header(klass, binaryblock) and returns: unknown, False