pub unsafe extern "C" fn manifold_box_union(
mem: *mut c_void,
a: *mut ManifoldBox,
b: *mut ManifoldBox,
) -> *mut ManifoldBox
pub unsafe extern "C" fn manifold_box_union(
mem: *mut c_void,
a: *mut ManifoldBox,
b: *mut ManifoldBox,
) -> *mut ManifoldBox