public static PageOutput open(List<FilterPlugin> plugins, List<TaskSource> taskSources,
            List<Schema> filterSchemas, PageOutput output) {
        return FiltersInternal.open(plugins, taskSources, filterSchemas, output);
    }
Utility class for handling multiple filter plugins.

<p>It is considered to be an internal class, not for plugins. To make it explicit, {@link FiltersInternal} replaces it.
embulk-core/src/main/java/org/embulk/spi/util/Filters.java