Function xmlSetStructuredErrorFunc 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlSetStructuredErrorFunc(
    ctx: *mut c_void,
    handler: Option<xmlStructuredErrorFunc>,
)

Set the structured error handler.

UPSTREAM-PARITY

void xmlSetStructuredErrorFunc(void *ctx, xmlStructuredErrorFunc handler);

SAFETY

• handler must be a valid function pointer or NULL.