code: public Actions sendKeys(WebElement target, CharSequence... keys) {
      if (isBuildingActions()) {
        action.addAction(new SendKeysAction(jsonKeyboard, jsonMouse, (Locatable) target, keys));
      }
  
      return focusInTicks(target).sendKeysInTicks(keys);
    }
docs: Equivalent to calling:
  <i>Actions.click(element).sendKeys(keysToSend).</i>
  This method is different from {@link WebElement#sendKeys(CharSequence...)} - see
  {@link #sendKeys(CharSequence...)} for details how.
  
  @see #sendKeys(java.lang.CharSequence[])
  
  @param target element to focus on.
  @param keys The keys.
  @return A self reference.
  
  @throws IllegalArgumentException if keys is null