class_docstr: Query is used to build complex queries that have more parameters than just
  the query string. The query string is set in the constructor, and other
  options have setter functions.
  
  The setter functions return the query object, so they can be chained,
  i.e. `Query("foo").verbatim().filter(...)` etc.
code: def _mk_field_list(self, fields: List[str]) -> List:
      if not fields:
          return []
      return [fields] if isinstance(fields, str) else list(fields)
  
imports: from typing import List, Optional, Union
label_desc: Use image node_id 6 for calling the Query obj's underlying member method code with example usage: obj._mk_field_list(fields) and returns: unknown, list