addArrayStringInput_(name, valueName, tooltipMessage) {
    const onChange = (input) => {
      shakaDemoMain.configure(valueName,
          input.value.split(',').filter(Boolean));
      shakaDemoMain.remakeHash();
    };
    this.addCustomTextInput_(name, onChange, tooltipMessage);
    const configValue = /** @type {!Array<string>} */ (
      shakaDemoMain.getCurrentConfigValue(valueName));
    this.latestInput_.input().value = configValue.join(',');
    return this;
  }
@param {!string} name
@param {string} valueName
@param {string=} tooltipMessage
@return {!shakaDemo.Config}
@private