#[no_mangle]
pub unsafe extern "C" fn forward_graph_any_extant_parent_demes(
graph: *const OpaqueForwardGraph,
status: *mut i32
) -> bool
#[no_mangle]
pub unsafe extern "C" fn forward_graph_any_extant_parent_demes(
graph: *const OpaqueForwardGraph,
status: *mut i32
) -> bool