class_docstr: Class for SPM2 variant of basic Analyze header
  
  SPM2 variant adds the following to basic Analyze format:
  
  * voxel origin;
  * slope scaling of data;
  * reading - but not writing - intercept of data.
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 binaryblock[344:348] not in (
          b"ni1\x00",
          b"n+1\x00",
      ) and 348 in (
          hdr_struct["sizeof_hdr"],
          bs_hdr_struct["sizeof_hdr"],
      )
  
file_path: nibabel/nibabel/spm2analyze.py
imports: import numpy
  from .None import spm99analyze
label_desc: Use image node_id 2 for calling the Spm2AnalyzeHeader obj's underlying member method code with example usage: obj.may_contain_header(klass, binaryblock) and returns: unknown, False