Function xsltRegisterExtModuleElement 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xsltRegisterExtModuleElement(
    name: *const xmlChar,
    URI: *const xmlChar,
    precomp: *mut c_void,
    transform: *mut c_void,
) -> c_int

xsltRegisterExtModuleElement (extensions.c): register an extension element (name in a module URI) with precompute + transform handlers.

UPSTREAM-PARITY

int xsltRegisterExtModuleElement(const xmlChar *name, const xmlChar *URI,
                                 xsltPreComputeFunction precomp,
                                 xsltTransformFunction transform);