Function xmlAddElementDecl 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlAddElementDecl(
    dtd: *mut _xmlDtd,
    name: *const xmlChar,
    type_: c_int,
    content: *mut _xmlElementContent,
) -> *mut _xmlElement

Add an element declaration.

UPSTREAM-PARITY

xmlElementPtr xmlAddElementDecl(xmlDtdPtr dtd, const xmlChar *name, int type,
                                xmlElementContentPtr content);