method LRU.prototype.mapimport { LRU } from "https://dotland.deno.dev/x/ultra@v1.0.1/src/deps.ts"; map(callbackfn: (value: [string, T],index: number,array: [string, T][],) => T, thisArg?: unknown): T[]Method creates a new array populated with the results of calling a provided function on every element in the calling array Parameterscallbackfn: (value: [string, T],index: number,array: [string, T][],) => TFunction that is called for every element of arr. Each time callback executes, the returned value is added to new_array optionalthisArg: unknownValue to use as this when executing callback ReturnsT[]