Yeah.. I should update the docstrings. Thank you for pointing this.
`value1` is a input box for package version and will be used by following version types:
- equal to
- greater than
- Less than
 The fourth version_type is 'Range', which actually opens two input boxes to define the range of versions. So value2 only be used with 'range'.

Let's say we have a package with series of  versions and we want to filter the version 3.5 to 5.5 then range will be used. So here 3.5  will be set as value1 and 5.5 as value2