https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar
  • Sirisha Pratha 
class org.eclipse.collections.impl.map.mutable.UnifiedMap$1
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.eclipse.collections.impl.map.mutable.UnifiedMap$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
         0: .line 69
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/map/mutable/UnifiedMap$1;

  public boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
        start local 1 // java.lang.Object obj
         0: .line 74
            new java.lang.RuntimeException
            dup
            ldc "Possible corruption through unsynchronized concurrent modification."
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/String;)V
            athrow
        end local 1 // java.lang.Object obj
        end local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/map/mutable/UnifiedMap$1;
            0    1     1   obj  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      obj   

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
         0: .line 80
            new java.lang.RuntimeException
            dup
            ldc "Possible corruption through unsynchronized concurrent modification."
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/map/mutable/UnifiedMap$1;

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
         0: .line 86
            ldc "UnifiedMap.NULL_KEY"
            areturn
        end local 0 // org.eclipse.collections.impl.map.mutable.UnifiedMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/map/mutable/UnifiedMap$1;
}
SourceFile: "UnifiedMap.java"
EnclosingMethod: org.eclipse.collections.impl.map.mutable.UnifiedMap
NestHost: org.eclipse.collections.impl.map.mutable.UnifiedMap
InnerClasses:
  org.eclipse.collections.impl.map.mutable.UnifiedMap$1