| bubbles | Returns whether this event type bubbles up in the event propagation path. | 
        | currentTarget | The current target of the event. This is the VisualElement, in the propagation path, for which event handlers are currently being executed. | 
        | dispatch | Indicates whether the event is being dispatched to a visual element. An event cannot be redispatched while it being dispatched. If you need to recursively dispatch an event, it is recommended that you use a copy of the event. | 
        | eventTypeId | Retrieves the type ID for this event instance. | 
        | imguiEvent | The IMGUIEvent at the source of this event. The source can be null since not all events are generated by IMGUI. | 
        | isDefaultPrevented | Returns true if the default actions should not be executed for this event. | 
        | isImmediatePropagationStopped | Indicates whether StopImmediatePropagation() was called for this event. | 
        | isPropagationStopped | Whether StopPropagation() was called for this event. | 
        | originalMousePosition | The original mouse position of the IMGUI event, before it is transformed to the current target local coordinates. | 
        | pooled | Whether the event is allocated from a pool of events. | 
        | propagationPhase | The current propagation phase for this event. | 
        | target | The target visual element that received this event. Unlike currentTarget, this target does not change when the event is sent to other elements along the propagation path. | 
        | timestamp | The time when the event was created, in milliseconds. | 
        | tricklesDown | Returns whether this event is sent down the event propagation path during the TrickleDown phase. | 
        | eventTypeId | Retrieves the type ID for this event instance. | 
        | actionKey | Returns true if the platform-specific action key is pressed. This key is Cmd on macOS, and Ctrl on all other platforms. | 
        | altKey | Returns true if the Alt key is pressed. | 
        | button | Integer that indicates which mouse button is pressed: 0 is the left button, 1 is the right button, 2 is the middle button. | 
        | clickCount | The number of times the button is pressed. | 
        | commandKey | Returns true if the Windows/Cmd key is pressed. | 
        | ctrlKey | Returns true if the Ctrl key is pressed. | 
        | currentTarget | The current target of the event. The current target is the element in the propagation path for which event handlers are currently being executed. | 
        | localMousePosition | The mouse position in the current target coordinate system. | 
        | modifiers | Flags that hold pressed modifier keys (Alt, Ctrl, Shift, Windows/Cmd). | 
        | mouseDelta | The difference of the mouse position between the previous mouse event and the current mouse event. | 
        | mousePosition | The mouse position in the screen coordinate system. | 
        | pressedButtons | A bitmask that describes the currently pressed buttons. | 
        | shiftKey | Returns true if the Shift key is pressed. |