func (s *Session) Fsync(async bool) error {
	return s.Run(bson.D{{"fsync", 1}, {"async", async}}, nil)
}
func (s *Session) Fsync(async bool) error {
	return s.Run(bson.D{{"fsync", 1}, {"async", async}}, nil)
}
func ( s * Session ) Fsync ( async bool ) error { return s . Run ( bson . D { { " " , 1 } , { " " , async } } , nil ) }
// Fsync flushes in-memory writes to disk on the server the session
// is established with. If async is true, the call returns immediately,
// otherwise it returns after the flush has been made.
Fsync flushes in - memory writes to disk on the server the session is established with . If async is true the call returns immediately otherwise it returns after the flush has been made .