Each tuple object has properties:
members [type: Array, elementType: dundas.data.HierarchyMember] - Gets the hierarchy and/or measure members.
ordinal [type: Number, integer: true] - Gets the tuple ordinal (index).
properties [type: Array, elementType: dundas.data.DataProperty] - Gets the miscellaneous properties.
The cellset must contain the data as returned by the server in response to the request and must not be modified in script.