public static class RowSetData.RelatedData
Data whose insertion has a dependency on some other data, either needing to be
inserted prior to or subsequent to the data.
Typically the pkFieldID will identify the field whose value is needed to insert
these rows, and the value for this field will be set for the fkFieldID for all
rows of this data. The referred field does not have to be primary key from that
table but usually is.