code: private static void addValue(CBuilder builder, ColumnDefinition def, ByteBuffer value) throws InvalidRequestException
      {
          if (value == null)
              throw new InvalidRequestException(String.format("Invalid null value in condition for column %s", def.name));
          builder.add(value);
      }
docs: Adds the specified value to the specified builder
  
  @param builder the CBuilder to which the value must be added
  @param def the column associated to the value
  @param value the value to add
  @throws InvalidRequestException if the value is null