code: private FilterChangeUserAgentDialog getFilterChangeUserAgentDialog() {
  		if (filterChangeUserAgentDialog == null) {
  		    filterChangeUserAgentDialog  = new FilterChangeUserAgentDialog(getView().getMainFrame(), true);
  		}
  		return filterChangeUserAgentDialog ;
  	}
docs: This method initializes filterReplaceDialog
  
  @return org.parosproxy.paros.extension.filter.FilterReplaceDialog