virtual absl::Status AddFunctionDef(const FunctionDef& fdef) = 0;

  // Notifies about the function removal.
  virtual absl::Status AddRemoveFunctionNotifier(
      const string& func, std::function<void()> notifier) = 0;

  // Same as `AddFunctionDef`, but additionally saves the `stack_traces` under
  // the key of the function definition name (to be retrieved during function
  // instantiation).

            public boolean isDirectory() { return fileInfo.isDirectory(); }
            // ... other attribute methods
        });
        
        return file;
    }
}
```

### 4.4 Directory Change Notifier
```java
package jcifs.internal.smb2.lease;

import jcifs.internal.smb2.ServerMessageBlock2;
import java.util.concurrent.ConcurrentHashMap;

public class DirectoryChangeNotifier {

pkg crypto/x509, type Certificate struct, Issuer pkix.Name
pkg crypto/x509, type Certificate struct, KeyUsage KeyUsage
pkg crypto/x509, type Certificate struct, MaxPathLen int
pkg crypto/x509, type Certificate struct, NotAfter time.Time
pkg crypto/x509, type Certificate struct, NotBefore time.Time
pkg crypto/x509, type Certificate struct, PermittedDNSDomains []string
pkg crypto/x509, type Certificate struct, PermittedDNSDomainsCritical bool

          <association>
            <multiplicity>*</multiplicity>
            <type>Notifier</type>
          </association>
        </field>
      </fields>
    </class>
    <class>
      <name>Notifier</name>
      <description>Configures one method for notifying users/developers when a build breaks.</description>
      <version>4.0.0+</version>