in src/stm.ts [268:278]
private purgeExistingOperationOn(key: Buffer) {
for (let i = 0; i < this.ops.length; i++) {
const { op, req } = this.ops[i];
if (op === WriteKind.Write || op === WriteKind.DeleteKey) {
if (req.key!.equals(key)) {
this.ops.splice(i, 1);
break;
}
}
}
}