code: public boolean get(final T paramOrigin, final T paramDestination) {
          assert paramOrigin != null;
          assert paramDestination != null;
          if (!mMap.containsKey(paramOrigin)) {
              return false;
          }
  
          final Boolean bool = mMap.get(paramOrigin).get(paramDestination);
          return bool != null && bool;
      }
docs: Returns whether there is a connection between a and b. Unknown objects do
  never have a connection.
  
  @param paramOrigin
  origin object
  @param paramDestination
  destination object
  @return true, iff there is a connection from a to b