code: def test_empty_deps_conversion():
      """
      Check that we can read and then output a sentence with empty dependencies
      """
      check_empty_deps_conversion(ESTONIAN_EMPTY_DEPS, 7)
  
imports: import io
  import pytest
  import tempfile
  from zipfile import ZipFile
  import stanza
  from stanza.utils.conll import CoNLL
  from stanza.models.common.doc import Document
  from stanza.tests import *
label_desc: Use image node_id 15 for calling a global function with example usage: test_empty_deps_conversion() without return types