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: snr_fwd_visibility_tilted.m
    path of file: ./repos/mpsim/lib/snr/geom/tilted
    
    the code of the file until where you have to start completion: function is_visible = snr_fwd_visibility_tilted (...
setup, geom, type) %#ok<INUSL>
    switch lower(type)
    case 'direct'
        is_visible = [];
    case 'reflection'
        %op = @gt;
        op = @ge;  % works at exact grazing incidence.

    
function is_visible = snr_fwd_visibility_tilted (...
setup, geom, type) %#ok<INUSL>
    switch lower(type)
    case 'direct'
        is_visible = [];
    case 'reflection'
        %op = @gt;
        op = @ge;  % works at exact grazing incidence.
        %is_visible = op(geom.direct.dir.local_ant.elev, 0);  % WRONG!
        is_visible = op(geom.reflection.sat_dir.sfc.elev, 0);
        % (checking the scattered grazing angle angle would be equivalent, 
        %  because of specular reflection equal-angle condition.)
        %is_visible = op(geom.reflection.delay, 0);  % EXPERIMENTAL (seems equivalent)
        if isfield(geom.reflection.extra, 'is_line_facing_plane') ...
        && isfield(geom.reflection.extra, 'is_degenerate')            
            % (snr_fwd_geometry_reflection_tilted was not optimized.)
            is_visible = is_visible ...
                &  geom.reflection.extra.is_line_facing_plane ...
                & ~geom.reflection.extra.is_degenerate;
        end