Define the group of features.

Values of this enumeration:

• DeviceRemote - Device remote features obtained from the device GenApi node tree.
• SystemGtl - System features obtained from the GenTL GenApi node tree.
• InterfaceGtl - Interface features obtained from the GenTL GenApi node tree.
• DeviceGtl - Device features obtained from the GenTL GenApi node tree.
• StreamGtl - Stream features obtained from the GenTL GenApi node tree.