in switch.js [30:46]
function SwitchRW(valrw, cases, opts) {
if (!(this instanceof SwitchRW)) {
return new SwitchRW(valrw, cases, opts);
}
opts = opts || {};
this.valrw = valrw;
this.cases = cases;
this.cons = opts.cons || Pair;
this.valKey = opts.valKey || '0';
this.dataKey = opts.dataKey || '1';
// istanbul ignore if TODO
if (opts.structMode) {
this.poolReadFrom = this.structReadFrom;
}
BufferRW.call(this);
}