code: def write(self, buf):
      self._write_buffer.write(buf)
  
imports: import struct
  import zlib
  from thrift.compat import BufferIO, byte_index
  from thrift.protocol.TBinaryProtocol import TBinaryProtocol
  from thrift.protocol.TCompactProtocol import TCompactProtocol, readVarint, writeVarint
  from thrift.Thrift import TApplicationException
  from thrift.transport.TTransport import CReadableTransport, TMemoryBuffer, TTransportBase, TTransportException
label_desc: Use image node_id 15 for calling the THeaderTransport obj's underlying member method code with example usage: obj.write(buf) without return types