private void initFields() {
      tag_ = 0L;
      type_ = org.box2d.proto.Box2D.PbBodyType.STATIC;
      position_ = org.box2d.proto.Box2D.PbVec2.getDefaultInstance();
      angle_ = 0F;
      linearVelocity_ = org.box2d.proto.Box2D.PbVec2.getDefaultInstance();
      angularVelocity_ = 0F;
      force_ = org.box2d.proto.Box2D.PbVec2.getDefaultInstance();
      torque_ = 0F;
      mass_ = 0F;
      i_ = 0F;
      linearDamping_ = 0F;
      angularDamping_ = 0F;
      gravityScale_ = 0F;
      bullet_ = false;
      allowSleep_ = false;
      awake_ = false;
      active_ = false;
      fixedRotation_ = false;
      fixtures_ = java.util.Collections.emptyList();
    }