class_docstr: Base class for all processors 
class_docstr_tok: ["Base","class","for","all","processors"]
docstr: The pipeline that this processor belongs to 
docstr_tok: ["The","pipeline","that","this","processor","belongs","to"]
code: def pipeline(self):
      """The pipeline that this processor belongs to"""
      return self._pipeline
  
imports: from abc import ABC, abstractmethod
  from stanza.models.common.doc import Document
  from stanza.pipeline.registry import NAME_TO_PROCESSOR_CLASS, PIPELINE_NAMES, PROCESSOR_VARIANTS
label_desc: Use image node_id 10 for calling the Processor obj's underlying member method code with example usage: obj.pipeline() and returns: self