function maybeExtractFormatTag(columnName) {
	let normalizedColName = columnName.toLowerCase();
	let lastUnderScoreIndex = normalizedColName.lastIndexOf('_');

	if (lastUnderScoreIndex > 0) {
		return normalizedColName.substr(lastUnderScoreIndex).replace('_', '');
	} else {
		return undefined;
	}
}
Extracts a possible format tag from a column name based on the column name pattern
@returns "column_${formatTag}" will return ${formatTag} or undefined if the columnName doesn't match the pattern