attachMultiMask(index) {
    if (!(this.isMultipleMasksField && this.component.inputMasks.length && this.refs.input.length)) {
      return false;
    }

    const maskSelect = this.refs.select[index];
    maskSelect.onchange = this.onSelectMaskHandler.bind(this);
    maskSelect.maskInput = this.refs.mask[index];
    this.setInputMask(maskSelect.maskInput, this.component.inputMasks[0].mask);
    return true;
  }
Attaches a selectable mask to an input field based on its configuration.
@param {number} index - The index of the select or input in component array.
@returns {boolean} - Returns true if the mask was successfully attached