https://github.com/oracle/graal: GraalVM is an ecosystem for compiling and running applications written in multiple languages. GraalVM removes the isolation between programming languages and enables interoperability in a shared runtime. 
class org.graalvm.collections.Equivalence$2 extends org.graalvm.collections.Equivalence
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.graalvm.collections.Equivalence$2
  super_class: org.graalvm.collections.Equivalence
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.collections.Equivalence$2 this
         0: .line 77
            aload 0 /* this */
            invokespecial org.graalvm.collections.Equivalence.<init>:()V
            return
        end local 0 // org.graalvm.collections.Equivalence$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/collections/Equivalence$2;

  public boolean equals(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.graalvm.collections.Equivalence$2 this
        start local 1 // java.lang.Object a
        start local 2 // java.lang.Object b
         0: .line 81
            aload 1 /* a */
            aload 2 /* b */
            if_acmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 2 // java.lang.Object b
        end local 1 // java.lang.Object a
        end local 0 // org.graalvm.collections.Equivalence$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/graalvm/collections/Equivalence$2;
            0    2     1     a  Ljava/lang/Object;
            0    2     2     b  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      a     
      b     

  public int hashCode(java.lang.Object);
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // org.graalvm.collections.Equivalence$2 this
        start local 1 // java.lang.Object o
         0: .line 86
            aload 1 /* o */
            invokevirtual java.lang.Object.hashCode:()I
            ireturn
        end local 1 // java.lang.Object o
        end local 0 // org.graalvm.collections.Equivalence$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/collections/Equivalence$2;
            0    1     1     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      o     
}
SourceFile: "Equivalence.java"
EnclosingMethod: org.graalvm.collections.Equivalence
NestHost: org.graalvm.collections.Equivalence
InnerClasses:
  org.graalvm.collections.Equivalence$2