const rules = await eda.pcb_Drc.getNetRules();
const sample = rules.slice(0,3);
const withTrack = rules.filter(r=>r['Track'] && r['Track']!=='default').slice(0,3);
const M = eda.pcb_Drc;
const methods = Object.getOwnPropertyNames(Object.getPrototypeOf(M)||{}).concat(Object.getOwnPropertyNames(M)).filter(n=>typeof M[n]==='function');
return {n: rules.length, keys: Object.keys(rules[0]||{}), sample, withTrack, methods};