class_docstr: Returns ForwardMsgs from our MessageCache
docstr: Initializes the handler.
  
  Parameters
  ----------
  cache : MessageCache
docstr_tok: ["Initializes","the","handler",".","Parameters","--","--","--","--","--","cache",":","MessageCache"]
code: def initialize(self, cache):
      """Initializes the handler.
  
      Parameters
      ----------
      cache : MessageCache
  
      """
      self._cache = cache
  
imports: import os
  import tornado.web
  from streamlit import config, file_util
  from streamlit.logger import get_logger
  from streamlit.runtime.runtime_util import serialize_forward_msg
  from streamlit.web.server.server_util import emit_endpoint_deprecation_notice
label_desc: Use image node_id 1 for calling the MessageCacheHandler obj's underlying member method code with example usage: obj.initialize(cache) without return types