https://www.graalvm.org/ 
final class com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache<K, V> extends java.util.LinkedHashMap<K, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache
  super_class: java.util.LinkedHashMap
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 7813848977534444613

  private final int maxCacheSize;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(int);
    descriptor: (I)V
    flags: (0x0000) 
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache this
        start local 1 // int maxCacheSize
         0: .line 1618
            aload 0 /* this */
            bipush 16
            ldc 0.75
            iconst_1
            invokespecial java.util.LinkedHashMap.<init>:(IFZ)V
         1: .line 1619
            aload 0 /* this */
            iload 1 /* maxCacheSize */
            putfield com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache.maxCacheSize:I
         2: .line 1620
            return
        end local 1 // int maxCacheSize
        end local 0 // com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    3     0          this  Lcom/oracle/truffle/js/builtins/ConstructorBuiltins$LRUCache<TK;TV;>;
            0    3     1  maxCacheSize  I
    MethodParameters:
              Name  Flags
      maxCacheSize  

  protected boolean removeEldestEntry(java.util.Map$Entry<K, V>);
    descriptor: (Ljava/util/Map$Entry;)Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache this
        start local 1 // java.util.Map$Entry eldest
         0: .line 1624
            aload 0 /* this */
            invokevirtual com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache.size:()I
            aload 0 /* this */
            getfield com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache.maxCacheSize:I
            if_icmple 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 1 // java.util.Map$Entry eldest
        end local 0 // com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lcom/oracle/truffle/js/builtins/ConstructorBuiltins$LRUCache<TK;TV;>;
            0    2     1  eldest  Ljava/util/Map$Entry<TK;TV;>;
    Signature: (Ljava/util/Map$Entry<TK;TV;>;)Z
    MethodParameters:
        Name  Flags
      eldest  
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/util/LinkedHashMap<TK;TV;>;
SourceFile: "ConstructorBuiltins.java"
NestHost: com.oracle.truffle.js.builtins.ConstructorBuiltins
InnerClasses:
  final LRUCache = com.oracle.truffle.js.builtins.ConstructorBuiltins$LRUCache of com.oracle.truffle.js.builtins.ConstructorBuiltins
  public abstract Entry = java.util.Map$Entry of java.util.Map