Function xmlLoadExternalEntity 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlLoadExternalEntity(
    URL: *const c_char,
    ID: *const c_char,
    ctxt: *mut _xmlParserCtxt,
) -> *mut _xmlParserInput

Load an external entity using the registered loader.

UPSTREAM-PARITY

xmlParserInputPtr xmlLoadExternalEntity(const char *URL, const char *ID,
                                        xmlParserCtxtPtr ctxt);