code: public boolean containsEntryFor(int maturityInMonths, int tenorInMonths, int moneynessBP) {
  		return entryMap.containsKey(new DataKey(maturityInMonths, tenorInMonths, moneynessBP));
  	}
docs: Returns true if the lattice contains an entry at the specified location.
  
  @param maturityInMonths The maturity in months to check.
  @param tenorInMonths The tenor in months to check.
  @param moneynessBP The moneyness in bp to check.
  @return True iff there is an entry at the specified location.