https://www.graalvm.org/ 
public final class com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl
  super_class: java.lang.Object
{
  public final com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[] one;
    descriptor: [Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL

  public final com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[] two;
    descriptor: [Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL

  void <init>(com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[], com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[]);
    descriptor: ([Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;[Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl this
        start local 1 // com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[] one
        start local 2 // com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[] two
         0: .line 424
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 425
            aload 0 /* this */
            aload 1 /* one */
            putfield com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl.one:[Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;
         2: .line 426
            aload 0 /* this */
            aload 2 /* two */
            putfield com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl.two:[Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;
         3: .line 427
            return
        end local 2 // com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[] two
        end local 1 // com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl[] one
        end local 0 // com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/oracle/truffle/sl/test/SLJavaInteropTest$TwoPairsImpl;
            0    4     1   one  [Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;
            0    4     2   two  [Lcom/oracle/truffle/sl/test/SLJavaInteropTest$PairImpl;
    MethodParameters:
      Name  Flags
      one   
      two   
}
SourceFile: "SLJavaInteropTest.java"
NestHost: com.oracle.truffle.sl.test.SLJavaInteropTest
InnerClasses:
  public final PairImpl = com.oracle.truffle.sl.test.SLJavaInteropTest$PairImpl of com.oracle.truffle.sl.test.SLJavaInteropTest
  public final TwoPairsImpl = com.oracle.truffle.sl.test.SLJavaInteropTest$TwoPairsImpl of com.oracle.truffle.sl.test.SLJavaInteropTest