@Override
    public Optional<JwtContext> getJwtContext(final String jwt, final boolean doVerification) {
        return getDelegate().getJwtContext(jwt, doVerification);
    }
A front for {@link InternalJwtContextFactory} and {@link StandardJwtContextFactory}
that picks the delegate based on the identity provider that has been configured, e.g.
internal vs external IDP.
stroom-security/stroom-security-impl/src/main/java/stroom/security/impl/DelegatingJwtContextFactory.java