Function yrs::yxmlelem_first_child

#[no_mangle]
pub unsafe extern "C" fn yxmlelem_first_child(
    xml: *const XmlElement, 
    txn: *const Transaction
) -> *mut YOutput

Returns a first child node of a current YXmlElement, or null pointer if current XML node is empty. Returned value could be either another YXmlElement or YXmlText.

A returned value should be eventually released using youtput_destroy function.