Commands are ways to execute actions after clicked by a user.

    <tc:link label="Apache Website" link="https://www.apache.org"/>

    <tc:button label="Submit"/>

    <tc:buttons>
      <tc:button label="Left" omit="true"/>
      <tc:button label="Center" omit="true"/>
      <tc:button label="Right" omit="true"/>
    </tc:buttons>

    <tc:links>
      <tc:link label="Apache Website" link="https://www.apache.org"/>
      <tc:link label="Wikipedia" link="https://en.wikipedia.org/wiki/Apache_Software_Foundation"/>
    </tc:links>