WebSVN group authentication

Is there a way of defining groups which contain other groups (nested)
within the access control file that will work with WebSVN?

So, instead of defining a group which contains individual members,
having a group which itself could be made up of other groups?

For example:

[groups]
developers = one, two, three

sysadmin = @developers, rherring, dgerman

IT = @developers, @sysadmin

[/admin]
* =
@IT = r

I can't get this to work using WebSVN 1.4.3. Nobody gains access to the
/admin folder.

Any help would be greatly appreciated.

Thanks,

Lisa

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