resolve
public Map<QueryPart,QueryPart> resolve()
Attempts to resolve the identifiers contained in the query in
 batches based on the parent, e.g. looking up and resolving the
 states in the set:
   { [Store].[USA].[CA], [Store].[USA].[OR] }
 together rather than individually.
 Note that there is no guarantee that all identifiers will be
 resolved.  Calculated members, for example, are explicitly not
 handled here.  The purpose of this class is to improve efficiency
 of resolution of non-calculated members, but must be followed
 by more thorough expression resolution.
- Returns:
 
- a Map of the expressions Id elements mapped to their
 respective resolved Exp.