class_docstr: Class for MGH format header
  
  The header also consists of the footer data which MGH places after the data
  chunk.
class_docstr_tok: ["Class","for","MGH","format","header","The","header","also","consists","of","the","footer","data","which","MGH","places","after","the","data","chunk","."]
docstr: Write header to fileobj
  
  Write starts at the beginning.
  
  Parameters
  ----------
  fileobj : file-like object
     Should implement ``write`` and ``seek`` method
  
  Returns
  -------
  None
docstr_tok: ["Write","header","to","fileobj","Write","starts","at","the","beginning",".","Parameters","--","--","--","--","--","fileobj",":","file-like","object","Should","implement","``","write","``","and","``","seek","``","method","Returns","--","--","--","-","None"]
code: def writehdr_to(self, fileobj):
      """Write header to fileobj
  
      Write starts at the beginning.
  
      Parameters
      ----------
      fileobj : file-like object
         Should implement ``write`` and ``seek`` method
  
      Returns
      -------
      None
      """
      hdr_nofooter = np.ndarray(
          (), dtype=self._hdrdtype, buffer=self.binaryblock
      )
      # goto the very beginning of the file-like obj
      fileobj.seek(0)
      fileobj.write(hdr_nofooter.tobytes())
  
imports: from os.path import splitext
  import numpy
  from ..affines import from_matvec, voxel_sizes
  from ..arrayproxy import ArrayProxy, reshape_dataobj
  from ..batteryrunners import BatteryRunner, Report
  from ..filebasedimages import SerializableImage
  from ..fileholders import FileHolder
  from ..filename_parser import _stringify_path
  from ..openers import ImageOpener
  from ..spatialimages import HeaderDataError, SpatialHeader, SpatialImage
  from ..volumeutils import Recoder, array_from_file, array_to_file, endian_codes
  from ..wrapstruct import LabeledWrapStruct
label_desc: Use image node_id 26 for calling the MGHHeader obj's underlying member method code with example usage: obj.writehdr_to(fileobj) without return types