3 #type uses of Radio

Radios::processRadios in core/lib/Drupal/Core/Render/Element/Radios.php: Expands a radios element into individual radio elements.
Table::processTable in core/lib/Drupal/Core/Render/Element/Table.php: #process callback for #type 'table' to add tableselect support.
Tableselect::processTableselect in core/lib/Drupal/Core/Render/Element/Tableselect.php: Creates checkbox or radio elements to populate a tableselect table.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.