import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
class main {
static Object metaMapWeakGet(IMeta o, Object key) {
if (o == null || key == null) return null;
Object meta = o._getMeta();
if (meta instanceof Map) {
Map weakMap = (Map) (((Map) meta).get("weak map"));
return mapGet(weakMap, key);
}
return null;
}
static B mapGet(Map map, A a) {
return map == null || a == null ? null : map.get(a);
}
static B mapGet(A a, Map map) {
return map == null || a == null ? null : map.get(a);
}
static interface IMeta {
// see class "Meta" for the bla bla
public void _setMeta(Object meta);
public Object _getMeta();
default public IAutoCloseableF0 _tempMetaMutex() {
return new IAutoCloseableF0() {
public Object get() { return IMeta.this; }
public void close() {}
};
}
}
static interface IAutoCloseableF0 extends IF0, AutoCloseable {}
static interface IF0 {
A get();
}
}