code: def setup_session():
      if not spark_installed:
          return None
      app = pyspark.sql.SparkSession.builder.appName("MyApp")
      spark = app.config(
          "spark.jars.packages",
          "com.microsoft.azure:synapseml_2.12:0.9.5",
      ).getOrCreate()
      return spark
  
label_desc: Use image node_id 1 for calling a global function with example usage: setup_session() and returns: spark, None