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: replace_dim.rs
    path of file: ./repos/dfdx/dfdx-core/src/shapes
    
    the code of the file until where you have to start completion: use super::{
    axes::{Axes, Axis},
    shape::{Dim, Shape},
};

/// Marker for shapes that can be indexed and have a dimension removed
pub trait RemoveDimTo<Dst: Shape, Idx: Shape>: Shape {
    type Ax: Axes<Array = [isize; 1]>;

    /// All dimension
    
    fn check(&self, idx: &Idx) {
        if Self::NUM_DIMS == Dst::NUM_DIMS {
            // replace 1 dim case
            assert!(Idx::NUM_DIMS <= Self::NUM_DIMS);
            let src_dims = self.concrete();
            let idx_dims = idx.concrete();
            for i in 0..Idx::NUM_DIMS - 1 {
                assert_eq!(src_dims[i], idx_dims[i], "dimension {i} not the same");
            }
        } else {
            // batch replace case - we actually don't need to check this case
            // at all
        }
    }