code: def h2oassembly_download_mojo_string_conversion_function():
      test_string_conversion_function(H2OFrame.ascharacter)
      test_string_conversion_function(H2OFrame.asfactor)
  
imports: import sys, os
  from tests import pyunit_utils
  from h2o.assembly import *
  from h2o.transforms.preprocessing import *
  from h2o.pipeline import H2OMojoPipeline
label_desc: Use image node_id 1 for calling a global function with example usage: h2oassembly_download_mojo_string_conversion_function() without return types