docstr: Initialize the handler
  
  Parameters
  ----------
  callback : callable
      A function that returns True if the server is healthy
docstr_tok: ["Initialize","the","handler","Parameters","--","--","--","--","--","callback",":","callable","A","function","that","returns","True","if","the","server","is","healthy"]
code: def initialize(self, callback):
      """Initialize the handler
  
      Parameters
      ----------
      callback : callable
          A function that returns True if the server is healthy
  
      """
      self._callback = callback
  
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 HealthHandler obj's underlying member method code with example usage: obj.initialize(callback) without return types