Function unwrap_template 

fn unwrap_template<P: AsRef<[f64]>, M: AsRef<[f64]>>(
    phases: &[P],
    mags: &[M],
    tes: &[f64],
    mask: &[u8],
    params: &RomeoParams,
    nx: usize,
    ny: usize,
    nz: usize,
) -> Vec<Vec<f64>>

Template-based multi-echo unwrapping.

1. Spatially unwrap the template echo using ROMEO weights
2. Temporally unwrap all other echoes outward from the template
3. Optionally re-unwrap uncertain voxels spatially