/// <summary>
        /// Try getting a mapped value given a migration source unique Id and the value to be mapped.
        /// </summary>
        /// <param name="fromSide">Left or Right of the migration source in the session configuration</param>
        /// <param name="sourceFieldValue">Value before the mapping rule is applied</param>
        /// <param name="valueMapName"></param>
        /// <param name="descriptionDocRootNode">The document that contains all the field information in a particular revision</param>
        /// <param name="mappedValue">Value after the mapping rule is applied</param>
        /// <returns>True if a mapping rule is applied; FALSE otherwise</returns>
        private bool GetMappedFieldValue(
            SourceSideTypeEnum fromSide,
            string sourceFieldValue,
            string valueMapName,
            XmlElement descriptionDocRootNode,
            out string mappedValue)
        {
            TraceManager.TraceVerbose("Getting mapped field value of '{0}' in Value Map '{1}'",
                                      sourceFieldValue ?? string.Empty, valueMapName ?? string.Empty);
            ValueMap valueMapEntry = null;

            foreach (ValueMap valueMap in m_session.WITCustomSetting.ValueMaps.ValueMap)
            {
                if (valueMap.name == valueMapName)
                {
                    valueMapEntry = valueMap;
                    break;
                }
            }

            if (null != valueMapEntry)
            {
                TraceManager.TraceVerbose("Applying mapped field value of '{0}' in Value Map '{1}'",
                                          sourceFieldValue ?? string.Empty, valueMapName ?? string.Empty);
                return(valueMapEntry.TryGetMappedValue(fromSide, sourceFieldValue, descriptionDocRootNode, out mappedValue));
            }
            else
            {
                TraceManager.TraceVerbose("Cannot find Value Map '{0}'", valueMapName ?? string.Empty);
                mappedValue = sourceFieldValue;
                return(false);
            }
        }