var database/sql/driver.DefaultParameterConverter

3 uses

	database/sql/driver (current package)
		types.go#L208: var DefaultParameterConverter defaultConverter

	database/sql
		convert.go#L97: 	nv.Value, err = driver.DefaultParameterConverter.ConvertValue(nv.Value)

	github.com/lib/pq
		array.go#L598: 	if iv, err = driver.DefaultParameterConverter.ConvertValue(iv); err != nil {