permission.py

This file defines a PermissionPair, which is a tuple of values imported from 'collections'. In the pair, a permission value is matched to a permission label.
Different Request Information permissions, Response permissions, Determination permissions, User Management Functionality permissions are assigned a value.
Then PermissionPairs are formed by the values and the associated title names of the permissions.
Example: PermissionPair(CLOSE, "Close Request"), where CLOSE represents the permission value for closing a request.

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