method ReadonlyArray.forEach Private ReadonlyArray.forEach(callbackfn: (value: T,index: number,array: readonly T[],) => void,thisArg?: any,): void Performs the specified action for each element in an array. Parameters callbackfn: (value: T,index: number,array: readonly T[],) => void A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array. optional thisArg: any An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value. Return Type void