code: def validate_split_by(split_by):
      return _validate_pivots(split_by)
  
file_path: perspective/python/perspective/perspective/viewer/validate.py
imports: from datetime import datetime
  from ..core import ALL_FILTERS, Aggregate, Plugin, Sort
  from ..core.exception import PerspectiveError
label_desc: Use image node_id 5 for calling a global function with example usage: validate_split_by(split_by) and returns: _validate_pivots