export interface ProcessWorkingSetSnapshot {
  workingSetKb: number | null;
}

export function sumWorkingSetKb(processes: readonly ProcessWorkingSetSnapshot[]): number | null {
  let total = 0;
  let hasAny = false;

  for (const process of processes) {
    if (process.workingSetKb == null || process.workingSetKb < 0) {
      continue;
    }

    total += process.workingSetKb;
    hasAny = true;
  }

  return hasAny ? total : null;
}