export default class Mem { info(): Promise; free(): Promise; used(): Promise; totalMem(): number; } export interface MemFreeInfo { totalMemMb: number; freeMemMb: number; } export interface MemUsedInfo { totalMemMb: number; usedMemMb: number; } export interface MemInfo extends MemFreeInfo, MemUsedInfo { freeMemPercentage: number; usedMemPercentage: number; }