System specific information that indicates the source of an actual data element (attribute | entity).
Values are system specific. Used when it's particularly important to know the source of a specific data element.Typical values are:
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'com.atlassian.confluence.spaces.SpacesQuery$Builder com.atlassian.confluence.spaces.SpacesQuery$Builder.forUser(com.atlassian.confluence.user.ConfluenceUser)'
