/// <summary>
        /// Converts this instance of <see cref="sysdiagram"/> to an instance of <see cref="sysdiagramDTO"/>.
        /// </summary>
        /// <param name="entity"><see cref="sysdiagram"/> to convert.</param>
        public static sysdiagramDTO ToDTO(this sysdiagram entity)
        {
            if (entity == null)
            {
                return(null);
            }

            var dto = new sysdiagramDTO();

            dto.name         = entity.name;
            dto.principal_id = entity.principal_id;
            dto.diagram_id   = entity.diagram_id;
            dto.version      = entity.version;
            dto.definition   = entity.definition;

            entity.OnDTO(dto);

            return(dto);
        }