GLib.Source.prototype.set_priority

function set_priority(priority: Number(gint)): void {
    // Gjs wrapper for g_source_set_priority()
}
  

Sets the priority of a source. While the main loop is being run, a source will be dispatched if it is ready to be dispatched and no sources at a higher (numerically smaller) priority are ready to be dispatched.

A child source always has the same priority as its parent. It is not permitted to change the priority of a source once it has been added as a child of another source.