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: draw.rs
    path of file: ./repos/ggez/src/graphics
    
    the code of the file until where you have to start completion: use super::{Canvas, Color, GraphicsContext, LinearColor, Rect};
use crate::context::Has;

/// A struct that represents where to put a drawab
    
    pub(crate) fn get_dest_mut(&mut self) -> &mut mint::Point2<f32> {
        if let Transform::Values { dest, .. } = &mut self.transform {
            dest
        } else {
            panic!("Cannot calculate destination value for a DrawParam matrix")
        }
    }