public static Schema getOutputSchema(List<Schema> schemas) {
        return ExecutorsInternal.getOutputSchema(schemas);
    }
Utility class for handling an executor plugin.

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