code: public static boolean setSpecialContentModeEnabled(
              AccessibilityNodeInfoCompat node, boolean enabled) {
          final int direction = (enabled) ? DIRECTION_FORWARD : DIRECTION_BACKWARD;
          return performSpecialAction(node, ACTION_TOGGLE_SPECIAL_CONTENT, direction);
      }
docs: Sends a message to ChromeVox indicating that it should enter or exit
  special content navigation. This is applicable for things like tables and
  math expressions.
  <p>
  NOTE: further navigation should occur at the default movement
  granularity.
  
  @param node The node representing the web content
  @param enabled Whether this mode should be entered or exited
  @return {@code true} if the action was performed, {@code false}
  otherwise.