public ProtocolBuilder corethreads(Integer corethreads) {
        this.corethreads = corethreads;
        return getThis();
    }
@Test
    void corethreads() {
        ProtocolBuilder builder = new ProtocolBuilder();
        builder.corethreads(10);
        Assertions.assertEquals(10, builder.build().getCorethreads());
    }