UPDATE: after this line of code in my app gets executed:
var eyeXHost = new EyeXHost();
then, eyeXHost object has this status:
_context: {Tobii.EyeX.Client.Context}
_dataStreams: Count = 1
_deletedDataStreams: Count = 0
_displaySizeStateAccessor: {EyeXFramework.EngineStateAccessor<Tobii.EyeX.Client.Size2>}
_environment: {Tobii.EyeX.Client.Environment}
_eyeTrackingDeviceStatusStateAccessor: {EyeXFramework.EngineStateAccessor<Tobii.EyeX.Framework.EyeTrackingDeviceStatus>}
_screenBoundsStateAccessor: {EyeXFramework.EngineStateAccessor<Tobii.EyeX.Client.Rect>}
_userPresenceStateAccessor: {EyeXFramework.EngineStateAccessor<Tobii.EyeX.Framework.UserPresence>}
_userProfileNameStateAccessor: {EyeXFramework.EngineStateAccessor<string>}
DisplaySize: {INVALID}
EyeTrackingDeviceStatus: {INVALID}
ScreenBounds: {INVALID}
UserPresence: {INVALID}
UserProfileName: {INVALID}