code: def get_preamble(self):
      preamble_addendum = f"setwd('{os.getcwd()}');"
  
      return RScript.generate_preamble(
          self.path,
          self.source,
          self.basedir,
          self.input,
          self.output,
          self.params,
          self.wildcards,
          self.threads,
          self.resources,
          self.log,
          self.config,
          self.rulename,
          self.conda_env,
          self.container_img,
          self.singularity_args,
          self.env_modules,
          self.bench_record,
          self.jobid,
          self.bench_iteration,
          self.cleanup_scripts,
          self.shadow_dir,
          preamble_addendum=preamble_addendum,
      )
  
imports: from abc import abstractmethod
  import os
  from pathlib import Path
  import tempfile
  import re
  from snakemake.exceptions import WorkflowError
  from snakemake.script import get_source, ScriptBase, PythonScript, RScript
  from snakemake.logging import logger
  from snakemake.common import is_local_file
  from snakemake.common import ON_WINDOWS
  from snakemake.sourcecache import SourceCache, infer_source_file
  from snakemake.utils import format
label_desc: Use image node_id 1 for calling the RJupyterNotebook obj's underlying member method code with example usage: obj.get_preamble() and returns: RScript