/// <summary>
        /// Check to see if there are any related Proficiencies, and load them if requested
        /// </summary>
        public static void CheckExpandProficiencies(SqlDataManager sdm, IEnumerable <TelegraphOperator> telegraphOperators, string expandString)
        {
            var telegraphOperatorsWhere = CreateTelegraphOperatorWhere(telegraphOperators);

            expandString = expandString.SafeToString();

            if (String.Equals(expandString, "all", StringComparison.OrdinalIgnoreCase) || expandString.IndexOf("proficiencies", StringComparison.OrdinalIgnoreCase) >= 0)
            {
                var childProficiencies = sdm.GetAllProficiencies <Proficiency>(telegraphOperatorsWhere);

                telegraphOperators.ToList()
                .ForEach(feTelegraphOperator => feTelegraphOperator.LoadProficiencies(childProficiencies));
            }
        }