code: def test_non_string_arg(spark):
      df = spark.read.format("vcf").load(
          "test-data/CEUTrio.HiSeq.WGS.b37.NA12878.20.21.vcf"
      )
      converted = glow.transform(
          "pipe",
          df,
          input_formatter="vcf",
          output_formatter="vcf",
          cmd=["cat"],
          in_vcf_header="infer",
      )
      assert converted.count() == 1075
  
imports: import pytest
  from pyspark.sql.utils import IllegalArgumentException
  import glow
label_desc: Use image node_id 4 for calling a global function with example usage: test_non_string_arg(spark) without return types