code: def read_item(self, snakefile):
      return self.workflow.sourcecache.open(snakefile).read()
  
file_path: snakemake/snakemake/linting/snakefiles.py
imports: import re
  from itertools import chain
  from snakemake.linting import Linter, Lint, links, NAME_PATTERN
label_desc: Use image node_id 3 for calling the SnakefileLinter obj's underlying member method code with example usage: obj.read_item(snakefile) and returns: self