docstr: When the system parameters change, get the state and emit it.
docstr_tok: ["When","the","system","parameters","change",",","get","the","state","and","emit","it","."]
code: def update_parameters(self, option):
      """When the system parameters change, get the state and emit it."""
      self.param.props["pivot"] = self.pivot_chk.isChecked()
      self.param.props["method"] = self.method_list[
          self.method_options.currentIndex()
      ]
      keys = map(lambda x: x[0], self.param.parameters)
      for pos, nameV in enumerate(keys):
          self.param.props[CONVERSION_DICT[nameV]] = self.psets[
              pos
          ].value()
      self.changed_parameter_sig.emit(self.param)
  
imports: from __future__ import division, print_function, absolute_import
  from vispy import app, visuals
  from vispy.visuals import transforms
  from vispy.io import load_data_file
  import sys
  import numpy
  import string
  import logging
  import traceback
  from PyQt5 import QtCore, QtGui, QtWidgets
label_desc: Use image node_id 2 for calling the SetupWidget obj's underlying member method code with example usage: obj.update_parameters(option) without return types