pub fn clear(&self) {
        let caches = self.caches.lock().unwrap();
        for cache in caches.iter() {
            if let Some(cache) = cache.upgrade() {
                cache.clear();
            }
        }
    }
/// Clear statement cache of all connections which were handed out by
/// the manager.
Clear statement cache of all connections which were handed out by
the manager.
Clear statement cache of all connections which were handed out by the manager .
pub fn clear(&self) {
        let caches = self.caches.lock().unwrap();
        for cache in caches.iter() {
            if let Some(cache) = cache.upgrade() {
                cache.clear();
            }
        }
    }
pub fn clear ( & self ) { let caches = self . caches . lock ( ) . unwrap ( ) ; for cache in caches . iter ( ) { if let Some ( cache ) = cache . upgrade ( ) { cache . clear ( ) ; } } }
Clear statement cache of all connections which were handed out by
the manager.
Clear statement cache of all connections which were handed out by the manager .
&self
&self