code: public boolean isMinimum(Token token) {
          Token minimum = DatabaseDescriptor.getPartitioner().getMinimumToken();
          return token.compareTo(minimum) == 0;
      }
docs: Returns {@code true} if the specified {@link Token} is the minimum accepted by the {@link IPartitioner}, {@code
  false} otherwise.
  
  @param token A {@link Token}.
  @return {@code true} if the specified {@link Token} is the minimum accepted by the {@link IPartitioner}, {@code
  false} otherwise.