const r = await eda.pcb_PrimitiveArc.create('', 11, 6102.365, 0, 6299.216, 196.851, 90, 5);
const A = (await eda.pcb_PrimitiveArc.getAll());
return {created: r ? Object.keys(r) : null, n: A.length,
        arc: A.length ? JSON.parse(JSON.stringify(A[0], (k,v)=> k==='async'?undefined:v)) : null};