@Override
    public void removeAuthorisationEntries(final Map<String, String> headers) {
        if (NullSafe.hasEntries(headers)) {
            getDelegate().removeAuthorisationEntries(headers);
        }
    }
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