How to use the @carbon/icons/lib/caret--up/16 function in @carbon/icons

const helperTextClasses = classMap({
      [`${prefix}--form__helper-text`]: true,
      [`${prefix}--form__helper-text--disabled`]: this.disabled,
    });

    const incrementButton = html`
      <button type="button" aria-atomic="true" aria-live="polite" aria-label="${this.incrementButtonAssistiveText}" class="${prefix}--number__control-btn up-icon">
        ${CaretUp16()}
      </button>
    `;
    const decrementButton = html`
      <button type="button" aria-atomic="true" aria-live="polite" aria-label="${this.decrementButtonAssistiveText}" class="${prefix}--number__control-btn down-icon">
        ${CaretDown16()}
      </button>
    `;