class_docstr: interface to work with individual chat
class_docstr_tok: ["interface","to","work","with","individual","chat"]
docstr: set date to start hiding messages
docstr_tok: ["set","date","to","start","hiding","messages"]
code: def hide_history(self, left_count):
      """
      set date to start hiding messages
      """
      self.memory.hide_history(self.chat_id, left_count)
  
imports: from mindsdb_sql.parser.ast import Identifier, Select, BinaryOperation, Constant, OrderBy
  from mindsdb.interfaces.storage import db
  from .types import ChatBotMessage
label_desc: Use image node_id 6 for calling the ChatMemory obj's underlying member method code with example usage: obj.hide_history(left_count) without return types