interface BreakpointManagerInterface

interface BreakpointManagerInterface {
    
    /**
     * Gets breakpoints for the specified group.
     *
     * @param string $group
     *   The breakpoint group to retrieve.
     *
     * @return \Drupal\breakpoint\BreakpointInterface[]
     *   Array of breakpoint plugins keyed by machine name.
     */
    public function getBreakpointsByGroup($group);
    
    /**
     * Gets all the existing breakpoint groups.
     *
     * @return array
     *   Array of breakpoint group labels. Keyed by group name.
     */
    public function getGroups();
    
    /**
     * Gets all the providers for the specified breakpoint group.
     *
     * @param string $group
     *   The breakpoint group to retrieve.
     *
     * @return array
     *   An array keyed by provider name with values of provider type (module or
     *   theme).
     */
    public function getGroupProviders($group);

}