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: mkv.rs
    path of file: ./repos/fselect/src/util/dimensions
    
    the code of the file until where you have to start completion: use crate::util::dimensions::DimensionsExtractor;
use std::fs::File;
use std::io;
use crate::util::Dimensions;
use matroska::MatroskaError;
use std::path::Path;

pub struct MkvDimensionsExtractor;

impl DimensionsExtractor for MkvDimensionsExtractor {
    fn 
    
    fn try_read_dimensions(&self, path: &Path) -> io::Result<Option<Dimensions>> {
        let fd = File::open(path)?;
        let matroska = matroska::Matroska::open(fd).map_err(|err| {
            match err {
                MatroskaError::Io(io) => { io }
                MatroskaError::UTF8(utf8) => { io::Error::new(io::ErrorKind::InvalidData, utf8) }
                e => io::Error::new(io::ErrorKind::InvalidData, e)
            }
        })?;
        Ok(matroska.tracks.iter()
            .find(|&track| track.tracktype == matroska::Tracktype::Video)
            .and_then(|ref track| {
                if let matroska::Settings::Video(settings) = &track.settings {
                    Some(Dimensions {
                        width: settings.pixel_width as usize,
                        height: settings.pixel_height as usize,
                    })
                } else { None }
            }))
    }