/// <summary>
/// Creates a new <see cref="BodyInfo"/> instance and adds it to this <see cref="BodyInfoManager"/>.
/// </summary>
/// <remarks>
/// Should only be used in the editor.
/// </remarks>
/// <returns>The new <see cref="BodyInfo"/> instance.</returns>
public BodyInfo CreateBody()
{
var id = GetNextFreeID();
var body = new BodyInfo(id);
Debug.Assert(!_bodies.ContainsKey(id));
_bodies.Add(id, body);
return body;
}