declare interface IFormFieldStrings {
    UnsupportedFieldType: string; 
    InvalidNumberValue: string;
    ToggleOnAriaLabel: string;
    ToggleOffAriaLabel: string;
    ToggleOnText: string;
    ToggleOffText: string;
    TextFormFieldPlaceholder: string;
    DateFormFieldPlaceholder: string;
    NumberFormFieldPlaceholder: string;
    LookupEmptyOptionText: string;

    // IDatePickerStrings
    months: string[];
    shortMonths: string[];
    days: string[];
    shortDays: string[];
    goToToday: string;
    isRequiredErrorMessage?: string;
    invalidInputErrorMessage?: string;
    prevMonthAriaLabel?: string;
    nextMonthAriaLabel?: string;
    prevYearAriaLabel?: string;
    nextYearAriaLabel?: string; 
  }
  
  declare module 'FormFieldStrings' {
    const strings: IFormFieldStrings;
    export = strings;
  }
  