code: def source_path(path=None):
      """
      Get source path inside arcadia
      :param path: path arcadia relative, e.g. yatest.common.source_path('devtools/ya')
      :return: absolute path to the source folder
      """
      return _join_path(_get_ya_plugin_instance().source_root, path)
  
imports: import errno
  import functools
  import json
  import os
  import sys
  import threading
  import six
label_desc: Use image node_id 13 for calling a global function with example usage: source_path(path) and returns: _join_path