code: public void setProxyIdpAuthenticationContextLookupStrategy(
        final Function<AuthenticationContext, ProxyIdpAuthenticationContext> strategy) {
      ComponentSupport.ifInitializedThrowUnmodifiabledComponentException(this);
      this.proxyIdpAuthenticationContextLookupStrategy = Constraint.isNotNull(strategy,
        "ProxyIdPAuthenticationContext lookup strategy cannot be null");
    }
docs: Set the strategy used to locate the {@link ProxyIdpAuthenticationContext}.
  
  @param strategy
  strategy used to locate the {@link ProxyIdpAuthenticationContext}