public class RankedArtifactSoapList
RankedArtifactSoapList class represents a list of artifacts with their ranks within a planning folder.
It contains a sequence of RankedArtifactSoapRow objects.
Note that the RankedArtifactSoapRow object is strictly
a data container used for one-way fetching of data about a list of objects. Its "setter" methods cannot be used
to change data on the server.