Function xmlCopyDoc 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlCopyDoc(
    doc: *const _xmlDoc,
    recursive: c_int,
) -> *mut _xmlDoc

Copy a document.

UPSTREAM-PARITY

xmlDocPtr xmlCopyDoc(const xmlDocPtr doc, int recursive);

Returns a newly allocated copy. Caller must free with xmlFreeDoc.