code: @Override
      public void putVector(String word, INDArray vector) {
          if (word == null)
              throw new IllegalArgumentException("No null words allowed");
          if (vector == null)
              throw new IllegalArgumentException("No null vectors allowed");
          int idx = vocab.indexOf(word);
          syn0.slice(idx).assign(vector);
  
      }
docs: Inserts a word vector
  
  @param word   the word to insert
  @param vector the vector to insert