Function xsltRegisterExtModuleTopLevel 

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

xsltRegisterExtModuleTopLevel (extensions.c): register a top-level extension element handler.

UPSTREAM-PARITY

int xsltRegisterExtModuleTopLevel(const xmlChar *name, const xmlChar *URI,
                                  xsltTopLevelFunction function);