@brief return whether the value has a subtype @sa https://json.nlohmann.me/api/byte_container_with_subtype/has_subtype/

iconForButtonType impl is the same for QtQuick and QtWidgets

Not needed to override. Just here to illustrate setHideDisabledButtons()

Insert a value at the first free index and get the index back

static*/

static */

* Check whether the connection of this ConnectionHandle is active. * * @return true if the ConnectionHandle refers to an active Signal

* Checks whether the connection is currently blocked. * * To change the blocked state of a connection, call ConnectionHandle::block. *