You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ext_polybius_square.rs
    path of file: ./repos/CaptfEncoder/CaptfEncoder-V3/main/src/apps/extensions/classical
    
    the code of the file until where you have to start completion: use std::collections::HashMap;

use fltk::group::*;

use crate::apps::widgets::WgtEncoder;

use super::super::ExtensionOption;
use super::super::encoding;
use super::super::IExtensionResult;

#[derive(Clone, Debug)]
pub struct Component {}

impl super::super::IExtensionComponent for Component {
    fn render(&self, grp: &Group) {
        let mut options: Vec<ExtensionOption> = Vec::new();

		options.push(Ex
    
    fn encode(&self, input: &str, options: &HashMap<String, String>) -> Option<Box<dyn IExtensionResult>> {
        let result = encoding::classical::polybius_square::encode(input, Some(options.clone()));
match result {
	Ok(val) => Some(Box::new(val)),
	Err(e) => {                
		Some(Box::new(encoding::EncodingResult
			{
				successed: false,
				val: String::from(""),
				message: format!("{:?}", e),
			}
		))
	},
}
    }