code: public static <A> Tuple7<A, A, A, A, A, A, A> fill(A a) {
          return tuple(a, a, a, a, a, a, a);
      }
docs: Given a value of type <code>A</code>, produced an instance of this tuple with each slot set to that value.
  
  @param a   the value to fill the tuple with
  @param <A> the value type
  @return the filled tuple
  @see Tuple2#fill