func (c *CommonCache) Get(key string) (interface{}, bool) {
	c.lock.RLock()
	defer c.lock.RUnlock()
	d, ok := c.data[key]
	return d, ok
}
// get cache value by key
get cache value by key
// get cache value by key
func (c *CommonCache) Get(key string) (interface{}, bool) {
	c.lock.RLock()
	defer c.lock.RUnlock()
	d, ok := c.data[key]
	return d, ok
}
func ( c * CommonCache ) Get ( key string ) ( interface { } , bool ) { c . lock . RLock ( ) defer c . lock . RUnlock ( ) d , ok := c . data [ key ] return d , ok }
get cache value by key
get cache value by key