+# Add a custom uint16_t field in the stream's packet context
+packet_context_type = stream_class.packet_context_type
+print("\nFields in default packet context:")
+for field in packet_context_type.fields:
+ print(str(type(field[1])) + " " + field[0])
+packet_context_type.add_field(uint16_type, "a_custom_packet_context_field")
+stream_class.packet_context_type = packet_context_type
+