[wpilib] Give Field2d a default Sendable name (#2953)

wpilibc/src/main/native/cpp/smartdashboard/Field2d.cpp

@@ -8,6 +8,7 @@
 #include "frc/smartdashboard/Field2d.h"
 
 #include "frc/smartdashboard/SendableBuilder.h"
+#include "frc/smartdashboard/SendableRegistry.h"
 
 using namespace frc;
 
@@ -15,14 +16,17 @@ Field2d::Field2d() {
   m_objects.emplace_back(
       std::make_unique<FieldObject2d>("Robot", FieldObject2d::private_init{}));
   m_objects[0]->SetPose(Pose2d{});
+  SendableRegistry::GetInstance().Add(this, "Field");
 }
 
-Field2d::Field2d(Field2d&& rhs) {
+Field2d::Field2d(Field2d&& rhs) : SendableHelper(std::move(rhs)) {
   std::swap(m_table, rhs.m_table);
   std::swap(m_objects, rhs.m_objects);
 }
 
 Field2d& Field2d::operator=(Field2d&& rhs) {
+  SendableHelper::operator=(std::move(rhs));
+
   std::swap(m_table, rhs.m_table);
   std::swap(m_objects, rhs.m_objects);
 

wpilibc/src/main/native/include/frc/smartdashboard/Field2d.h

@@ -20,6 +20,7 @@
 #include "frc/geometry/Rotation2d.h"
 #include "frc/smartdashboard/FieldObject2d.h"
 #include "frc/smartdashboard/Sendable.h"
+#include "frc/smartdashboard/SendableHelper.h"
 
 namespace frc {
 
@@ -41,7 +42,7 @@ namespace frc {
  * also be shown by using the GetObject() function.  Other objects can
  * also have multiple poses (which will show the object at multiple locations).
  */
-class Field2d : public Sendable {
+class Field2d : public Sendable, public SendableHelper<Field2d> {
  public:
   using Entry = size_t;
 

wpilibj/src/main/java/edu/wpi/first/wpilibj/smartdashboard/Field2d.java

@@ -41,6 +41,7 @@ public class Field2d implements Sendable {
     FieldObject2d obj = new FieldObject2d("Robot");
     obj.setPose(new Pose2d());
     m_objects.add(obj);
+    SendableRegistry.add(this, "Field");
   }
 
   /**