class_docstr: Context stores model relevant worker information
  Some fixed during load times and some set by the service
class_docstr_tok: ["Context","stores","model","relevant","worker","information","Some","fixed","during","load","times","and","some","set","by","the","service"]
code: def get_request_header(self, idx: int, key: str) -> Optional[str]:
      return self._request_processor[idx].get_request_property(key)
  
imports: from typing import Dict, Optional, Tuple
label_desc: Use image node_id 8 for calling the Context obj's underlying member method code with example usage: obj.get_request_header(idx, key) and returns: self