code: def test_missing_values(spark):
      variant_df = spark.read.format("vcf").load(
          "test-data/combined.chr20_18210071_18210093.g.vcf"
      )
      sample_ids = ["HG00096", "HG00268", "NA19625"]
      with pytest.raises(AnalysisException):
          wgr_functions.block_variants_and_samples(
              variant_df,
              sample_ids,
              variants_per_block=10,
              sample_block_count=2,
          )
  
file_path: glow/python/glow/wgr/tests/test_block_variants_and_samples.py
imports: from glow import glow
  from glow.wgr import wgr_functions
  import pytest
  from pyspark.sql import Row
  from pyspark.sql.functions import expr
  from pyspark.sql.utils import AnalysisException
label_desc: Use image node_id 3 for calling a global function with example usage: test_missing_values(spark) without return types