A.11. wl_data_device_manager - data transfer interface
The wl_data_device_manager is a singleton global object that provides access to inter-client data transfer mechanisms such as copy-and-paste and drag-and-drop. These mechanisms are tied to a wl_seat and this interface lets a client get a wl_data_device corresponding to a wl_seat.
A.11.1. Requests provided by wl_data_device_manager
A.11.1.1. wl_data_device_manager::create_data_source - create a new data source