pub fn from_cid_sid(cid: u8, sid: u8) -> Option<&'static Self> {
        let class = Class::from_id(cid);

        class.and_then(|c| c.subclasses().find(|s| s.id == sid))
    }
/// Returns the [`Subclass`] corresponding to the given class and subclass IDs, or `None` if no such device exists in the DB.
Returns the [`Subclass`] corresponding to the given class and subclass IDs, or `None` if no such device exists in the DB.
Returns the [ ` Subclass ` ] corresponding to the given class and subclass IDs or ` None ` if no such device exists in the DB .
pub fn from_cid_sid(cid: u8, sid: u8) -> Option<&'static Self> {
        let class = Class::from_id(cid);
        class.and_then(|c| c.subclasses().find(|s| s.id == sid))
    }
pub fn from_cid_sid ( cid : u8 , sid : u8 ) -> Option < & ' static Self > { let class = Class :: from_id ( cid ) ; class . and_then ( | c | c . subclasses ( ) . find ( | s | s . id == sid ) ) }
Returns the [`Subclass`] corresponding to the given class and subclass IDs, or `None` if no such device exists in the DB.
Returns the [ ` Subclass ` ] corresponding to the given class and subclass IDs or ` None ` if no such device exists in the DB .
cid
u8
sid
u8
cid
u8
sid
u8