### Question:
Float64MultiArray extends Message { public static Float64MultiArray fromMessage(Message m) { return Float64MultiArray.fromJsonObject(m.toJsonObject()); } Float64MultiArray();  Float64MultiArray(MultiArrayLayout layout, double[] data); MultiArrayLayout getLayout(); int size(); double get(int index); double[] getData(); @Override Float64MultiArray clone(); static Float64MultiArray fromJsonString(java.lang.String jsonString); static Float64MultiArray fromMessage(Message m); static Float64MultiArray fromJsonObject(JsonObject jsonObject); static final java.lang.String FIELD_LAYOUT; static final java.lang.String FIELD_DATA; static final java.lang.String TYPE; }### Answer:
@Test public void testFromMessage() { Message m = new Message(a1.toString()); Float64MultiArray p = Float64MultiArray.fromMessage(m); assertEquals(a1.toString(), p.toString()); assertEquals(a1.toJsonObject(), p.toJsonObject()); assertEquals(a1.getMessageType(), p.getMessageType()); assertEquals(a1.size(), p.size()); assertTrue(Arrays.equals(a1.getData(), p.getData())); assertEquals(a1.getLayout(), p.getLayout()); assertNotSame(a1, p); assertNotSame(a1.toString(), p.toString()); assertNotSame(a1.toJsonObject(), p.toJsonObject()); }