[RequireComponent(typeof(Rigidbody2D))]
public class MyCustomClass : BaseMonoBehaviour
{
    public bool m_CanMove;

    public override bool OnValidateProperty(string propertyName)
    {
        if (propertyName == "m_CanMove")
        {
            if (!m_CanMove)
            {
                GetComponent<Rigidbody2D>().bodyType = RigidbodyType2D.Static;
                return true;
            }
        }

        return base.OnValidateProperty(propertyName);
    }
}