Utility methods related to stages.
| GetCurrentStage | The current Stage can either be the MainStage or any other opened Stage, visualized in the Scene view as the last breadcrumb in the breadcrumb bar. | 
| GetCurrentStageHandle | Get the current stage being edited. | 
| GetMainStage | Get the MainStage object. This object is always available. | 
| GetMainStageHandle | Get the main stage which contains all the currently open regular Scenes. | 
| GetStage | Get the Stage object that contains the input GameObject or Scene. | 
| GetStageHandle | Get the stage in which the given GameObject exists. | 
| GoBackToPreviousStage | Navigate the Editor to the previous stage. | 
| GoToMainStage | Navigate the Editor to the main stage. | 
| GoToStage | Navigates the Editor to the specified stage. | 
| IsGameObjectRenderedByCamera | Is the given GameObject rendered by the given Camera? | 
| IsGameObjectRenderedByCameraAndPartOfEditableScene | Specifies whether the given Camera currently renders the given GameObject and the GameObject is also part of an editable scene. | 
| PlaceGameObjectInCurrentStage | Place the given GameObject in the current stage being edited. |