igraph_roots_for_tree_layout

igraph

Function igraph_roots_for_tree_layout 

Source 
pub unsafe extern "C" fn igraph_roots_for_tree_layout(
    graph: *const igraph_t,
    mode: igraph_neimode_t,
    roots: *mut igraph_vector_int_t,
    use_eccentricity: igraph_root_choice_t,
) -> igraph_error_t