code: private void updateTemporalSemantics(long currentSemanticPartitionStartTime,
                                           SemanticSpace semanticPartition) {
          
          // Pre-allocate the zero vector so that if multiple interesting words
          // are not present in the space, they all point to the same zero
          // semantics
          double[] zeroVector = new double[semanticPartition.getVectorLength()];
  
          for (String word : interestingWords) {
              // update the vectors
              SortedMap<Long,double[]> temporalSemantics = 
                  wordToTemporalSemantics.get(word);
              Vector v = semanticPartition.getVector(word);
              // If the wor was not present in the current partition, then just
              // use the zero vector.  Otherwise, use it distirbution.
              double[] semantics = (v == null) 
                  ? zeroVector
                  : Vectors.asDouble(v).toArray();
  
              temporalSemantics.put(currentSemanticPartitionStartTime,
                                    semantics);
          }
      }
docs: Adds the temporal semantics for each interesting word using the provided
  semantic partition.
  
  @param currentSemanticPartitionStartTime the start time of the semantic
  partition