code: @Override
  	public Object toJdbc(final OptionalDouble original, final Connection connection,
  			final BindParameterMapperManager parameterMapperManager) {
  		return original.isPresent() ? original.getAsDouble() : null;
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.parameter.mapper.BindParameterMapper#toJdbc(java.lang.Object, java.sql.Connection, jp.co.future.uroborosql.parameter.mapper.BindParameterMapperManager)