This extension point is used to define Ontology Explorer behaviour when the user selects a tree element by a double click or other default selection mechanism used on the current platform. <p> The behaviour should be based on the type of the double clicked node. </p> A floating point number that is used to determine the consultation order of active doubleClickAction extensions. The extensions are consulted in descending priority order. Implement fi.vtt.simantics.ode.ui.IDoubleClickAction. [Enter the first release in which this extension point appears.] [Enter extension point usage example here.] [Enter information about supplied implementation of this extension point.]