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