Provides the definition of the Relation Service.
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Returns all roles present in the relation.
Returns all roles present in the relation.
Returns all roles present in the relation.
Returns all roles present in the relation.
Retrieves values of roles with given names.
Retrieves values of roles with given names in given relation.
Retrieves values of roles with given names in given relation.
Retrieves values of roles with given names.
Sets the given roles in given relation.
Sets the given roles in given relation.