declare namespace org {
    namespace spongepowered {
        namespace api {
            namespace util {
                // @ts-ignore
                 class GuavaCollectors {
                    /**
                     * Collect the values from a stream to an {@link ImmutableList}.
                     */
                    // @ts-ignore
                    public static toImmutableList(): any;
                    /**
                     * Collect the values from a stream to an {@link ImmutableSet}.
                     */
                    // @ts-ignore
                    public static toImmutableSet(): any;
                }
            }
        }
    }
}
