Theme functions theme_radios() and theme_checkboxes() have been removed in favor of the identical function theme_container().

Specific markup for radios and checkboxes can be achieved by using theme hook suggestions for the theme_container() function. See examples below.

Examples

Calling theme functions, before:
  theme('radios', $variables);
  theme('checkboxes', $variables);
Calling theme functions, after:
  theme('container__radios', $variables);
  theme('container__checkboxes', $variables);
Overriding theme functions, before:
  function theme_radios($variables) {
    ...
  }
  function theme_checkboxes($variables) {
    ...
  }
Overriding theme functions, after:
  function theme_container__radios($variables) {
  ...
  }
  function theme_container__checkboxes($variables) {
  ...
  }
Introduced in branch: 
1.0.x
Introduced in version: 
1.0.0
Impacts: 
Module developers
Theme developers
Related Github Issues: 
https://github.com/backdrop/backdrop-issues/issues/197