session: implement getters and setters on messages

session/response.go

@@ -0,0 +1,16 @@
+package session
+
+// GetID is an ID field getter.
+func (m CreateResponse) GetID() TokenID {
+	return m.ID
+}
+
+// SetID is an ID field setter.
+func (m *CreateResponse) SetID(id TokenID) {
+	m.ID = id
+}
+
+// SetSessionKey is a SessionKey field setter.
+func (m *CreateResponse) SetSessionKey(key []byte) {
+	m.SessionKey = key
+}