01 package trail.entity.query;
02
03 import trail.entity.beans.*;
04 import java.util.*;
05
06 public interface Calculator {
07
08 public Collection <Fund> getFunds ();
09 public Collection <Investor> getInvestors ();
10 public Collection <TimedRecord> getRecords ();
11 public Collection <TimedRecord> filterRecords (double low, double high);
12
13 }
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