Config is a typed wrapper around a Spec.

Match determines which requests the rule applies to.

ObjectTemplate represents a component of a relationship where some fields may be omitted or templated.

PreFilter defines a LookupResources or LookupSubjects request the results of which are used to filter responses.

RelationshipTemplate represents a relationship where some fields may be omitted or templated.

Spec defines a single rule for the proxy that matches incoming requests to an optional set of checks, an optional set of writes, and an optional filter.

StringOrTemplate either contains a string representing a relationship template, or a full RelationshipTemplate definition.