chromium/chrome/browser/resources/settings/privacy_page/collapse_radio_button.html

    <style include="settings-shared cr-radio-button-style">
      :host {
        display: block;
      }

      :host([disabled]) {
        opacity: 1;
      }

      cr-policy-pref-indicator,
      :host([disabled]) cr-expand-button {
        pointer-events: auto;
      }

      :host([disabled]) .disc-wrapper {
        opacity: var(--cr-disabled-opacity);
      }

      cr-collapse {
        margin-inline-end: 0;
        margin-inline-start: calc(var(--cr-radio-button-label-spacing, 20px)
            + var(--cr-radio-button-size));
      }

      .disc-wrapper {
        margin-inline-end: var(--cr-radio-button-label-spacing, 20px);
      }

      .separator {
        margin-inline-end: 0;
        min-height: calc(var(--settings-collapse-toggle-min-height, 48px) / 2);
      }

      #borderWrapper {
        align-items: center;
        border-top: var(--settings-collapse-separator-line);
        display: flex;
        min-height: var(--settings-collapse-toggle-min-height);
        width: 100%;
      }

      #buttonIcon {
        padding-inline-end: 6px;
      }

      #labelWrapper {
        --cr-radio-button-label-spacing: 0;
      }

      #radioCollapse {
        align-items: center;
        display: flex;
      }

      slot[name='noSelectionCollapse'] {
       cursor: auto;
      }
    </style>
    <div id="radioCollapse">
      <div aria-checked$="[[getAriaChecked_(checked)]]"
          aria-disabled$="[[getAriaDisabled_(disabled)]]"
          aria-labelledby="label"
          aria-describedby="sub-label"
          class="disc-wrapper"
          id="button"
          role="radio"
          tabindex$="[[buttonTabIndex_]]"
          on-focus="onRadioFocus_"
          on-keydown="onInputKeydown_">
        <div class="disc-border"></div>
        <div class="disc"></div>
      </div>
      <div id="borderWrapper">
        <iron-icon id="buttonIcon"
            icon="[[icon]]" hidden$="[[!icon]]"></iron-icon>
        <div id="labelWrapper" class="cr-padded-text">
          <div id="label" aria-hidden="true">
            [[label]]
            <slot name="label"></slot>
          </div>
          <div hidden$="[[!subLabel]]" id="sub-label" class="secondary">
            [[subLabel]]
            <slot name="sub-label"></slot>
          </div>
        </div>
        <template is="dom-if" if="[[pref]]">
          <cr-policy-pref-indicator pref="[[pref]]"
              icon-aria-label="[[indicatorAriaLabel]]"
              associated-value="[[name]]" on-focus="onNonRadioFocus_">
          </cr-policy-pref-indicator>
        </template>
        <div hidden$="[[noCollapse]]" class="separator"></div>
        <cr-expand-button id="expandButton" no-hover
              aria-label="[[expandAriaLabel]]"
              hidden$="[[noCollapse]]" expanded="{{expanded}}"
              on-click="onExpandClicked_"
              on-focus="onNonRadioFocus_">
        </cr-expand-button>
      </div>
    </div>

    <cr-collapse opened="[[expanded]]">
      <slot name="collapse"></slot>
      <slot name="noSelectionCollapse"></slot>
    </cr-collapse>