Why does cpy() method for Vec2 in box2d not exist?

I need to use this method in order to prevent my code from making an unwanted reference to a Vec2 object. This is because the rayCast callback function uses the same point variable.

I looked at the documentation but I couldn't find it (I could only find it on libGDX https://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/math/Vector2.html#cpy--)

class RayCastClosestCallback implements RayCastCallback {

  boolean m_hit;
  Vec2 m_point;
  Vec2 m_normal;
  float m_fraction;

  void reset(){
    m_hit = false;
    m_point = new Vec2();
    m_normal = new Vec2();
    m_fraction = 1;
  }

  float reportFixture(Fixture fixture, Vec2 point, Vec2 normal, float fraction) {
    /*
      public float reportFixture() - triggers when collision with ray occurs
     returns distance of collision
     */
    m_hit = true;
    m_point = point.cpy();  // this returns an error : "The function "cpy()" does not exist"
    m_normal = normal;
    m_fraction = fraction;
    return 1;//fraction;
  }
}