class_docstr: Write data in VISSR archive format.
class_docstr_tok: ["Write","data","in","VISSR","archive","format","."]
docstr: Write placeholders from current position to target byte.
docstr_tok: ["Write","placeholders","from","current","position","to","target","byte","."]
code: def _fill(self, fd, target_byte):
      """Write placeholders from current position to target byte."""
      nbytes = target_byte - fd.tell()
      fd.write(b" " * nbytes)
  
imports: import datetime
  import gzip
  import fsspec
  import numpy
  import pytest
  import xarray
  from pyresample.geometry import AreaDefinition
  import satpy.tests.reader_tests.gms.test_gms5_vissr_data
  from satpy.readers import FSFile
  from satpy.tests.reader_tests.utils import get_jit_methods, skip_numba_unstable_if_missing
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 8 for calling the VissrFileWriter obj's underlying member method code with example usage: obj._fill(fd, target_byte) without return types