https://www.graalvm.org/ 
class com.oracle.truffle.polyglot.HostObject$Instantiate
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.polyglot.HostObject$Instantiate
  super_class: java.lang.Object
{
  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 714
            ldc Lcom/oracle/truffle/polyglot/HostObject;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic com.oracle.truffle.polyglot.HostObject$Instantiate.$assertionsDisabled:Z
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.polyglot.HostObject$Instantiate this
         0: .line 714
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.polyglot.HostObject$Instantiate this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/HostObject$Instantiate;

  static java.lang.Object doUnsupported(com.oracle.truffle.polyglot.HostObject, java.lang.Object[]);
    descriptor: (Lcom/oracle/truffle/polyglot/HostObject;[Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.polyglot.HostObject receiver
        start local 1 // java.lang.Object[] args
         0: .line 719
            invokestatic com.oracle.truffle.api.interop.UnsupportedMessageException.create:()Lcom/oracle/truffle/api/interop/UnsupportedMessageException;
            athrow
        end local 1 // java.lang.Object[] args
        end local 0 // com.oracle.truffle.polyglot.HostObject receiver
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0  receiver  Lcom/oracle/truffle/polyglot/HostObject;
            0    1     1      args  [Ljava/lang/Object;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedMessageException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"!receiver.isClass()"})
    MethodParameters:
          Name  Flags
      receiver  
      args      

  static java.lang.Object doArrayCached(com.oracle.truffle.polyglot.HostObject, java.lang.Object[], com.oracle.truffle.api.interop.InteropLibrary, com.oracle.truffle.api.profiles.BranchProfile);
    descriptor: (Lcom/oracle/truffle/polyglot/HostObject;[Ljava/lang/Object;Lcom/oracle/truffle/api/interop/InteropLibrary;Lcom/oracle/truffle/api/profiles/BranchProfile;)Ljava/lang/Object;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=7, args_size=4
        start local 0 // com.oracle.truffle.polyglot.HostObject receiver
        start local 1 // java.lang.Object[] args
        start local 2 // com.oracle.truffle.api.interop.InteropLibrary indexes
        start local 3 // com.oracle.truffle.api.profiles.BranchProfile error
         0: .line 726
            aload 1 /* args */
            arraylength
            iconst_1
            if_icmpeq 3
         1: .line 727
            aload 3 /* error */
            invokevirtual com.oracle.truffle.api.profiles.BranchProfile.enter:()V
         2: .line 728
            iconst_1
            aload 1 /* args */
            arraylength
            invokestatic com.oracle.truffle.api.interop.ArityException.create:(II)Lcom/oracle/truffle/api/interop/ArityException;
            athrow
         3: .line 730
      StackMap locals:
      StackMap stack:
            aload 1 /* args */
            iconst_0
            aaload
            astore 4 /* arg0 */
        start local 4 // java.lang.Object arg0
         4: .line 732
            aload 2 /* indexes */
            aload 4 /* arg0 */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.fitsInInt:(Ljava/lang/Object;)Z
            ifeq 7
         5: .line 733
            aload 2 /* indexes */
            aload 4 /* arg0 */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.asInt:(Ljava/lang/Object;)I
            istore 5 /* length */
        start local 5 // int length
         6: .line 734
            goto 9
        end local 5 // int length
         7: .line 735
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 3 /* error */
            invokevirtual com.oracle.truffle.api.profiles.BranchProfile.enter:()V
         8: .line 736
            aload 1 /* args */
            invokestatic com.oracle.truffle.api.interop.UnsupportedTypeException.create:([Ljava/lang/Object;)Lcom/oracle/truffle/api/interop/UnsupportedTypeException;
            athrow
        start local 5 // int length
         9: .line 738
      StackMap locals: int
      StackMap stack:
            aload 0 /* receiver */
            invokevirtual com.oracle.truffle.polyglot.HostObject.asClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getComponentType:()Ljava/lang/Class;
            iload 5 /* length */
            invokestatic java.lang.reflect.Array.newInstance:(Ljava/lang/Class;I)Ljava/lang/Object;
            astore 6 /* array */
        start local 6 // java.lang.Object array
        10: .line 739
            aload 6 /* array */
            aload 0 /* receiver */
            getfield com.oracle.truffle.polyglot.HostObject.languageContext:Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;
            invokestatic com.oracle.truffle.polyglot.HostObject.forObject:(Ljava/lang/Object;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;)Lcom/oracle/truffle/polyglot/HostObject;
            areturn
        end local 6 // java.lang.Object array
        end local 5 // int length
        end local 4 // java.lang.Object arg0
        end local 3 // com.oracle.truffle.api.profiles.BranchProfile error
        end local 2 // com.oracle.truffle.api.interop.InteropLibrary indexes
        end local 1 // java.lang.Object[] args
        end local 0 // com.oracle.truffle.polyglot.HostObject receiver
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   11     0  receiver  Lcom/oracle/truffle/polyglot/HostObject;
            0   11     1      args  [Ljava/lang/Object;
            0   11     2   indexes  Lcom/oracle/truffle/api/interop/InteropLibrary;
            0   11     3     error  Lcom/oracle/truffle/api/profiles/BranchProfile;
            4   11     4      arg0  Ljava/lang/Object;
            6    7     5    length  I
            9   11     5    length  I
           10   11     6     array  Ljava/lang/Object;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedMessageException, com.oracle.truffle.api.interop.UnsupportedTypeException, com.oracle.truffle.api.interop.ArityException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"receiver.isArrayClass()"})
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
      2:
        com.oracle.truffle.api.library.CachedLibrary(limit = "1")
      3:
        com.oracle.truffle.api.dsl.Cached$Shared(value = "error")
        com.oracle.truffle.api.dsl.Cached()
    MethodParameters:
          Name  Flags
      receiver  
      args      
      indexes   
      error     

  static java.lang.Object doObjectCached(com.oracle.truffle.polyglot.HostObject, java.lang.Object[], com.oracle.truffle.polyglot.HostObject$LookupConstructorNode, com.oracle.truffle.polyglot.HostExecuteNode, com.oracle.truffle.api.profiles.BranchProfile);
    descriptor: (Lcom/oracle/truffle/polyglot/HostObject;[Ljava/lang/Object;Lcom/oracle/truffle/polyglot/HostObject$LookupConstructorNode;Lcom/oracle/truffle/polyglot/HostExecuteNode;Lcom/oracle/truffle/api/profiles/BranchProfile;)Ljava/lang/Object;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=5, locals=6, args_size=5
        start local 0 // com.oracle.truffle.polyglot.HostObject receiver
        start local 1 // java.lang.Object[] arguments
        start local 2 // com.oracle.truffle.polyglot.HostObject$LookupConstructorNode lookupConstructor
        start local 3 // com.oracle.truffle.polyglot.HostExecuteNode executeMethod
        start local 4 // com.oracle.truffle.api.profiles.BranchProfile error
         0: .line 747
            getstatic com.oracle.truffle.polyglot.HostObject$Instantiate.$assertionsDisabled:Z
            ifne 1
            aload 0 /* receiver */
            invokevirtual com.oracle.truffle.polyglot.HostObject.isArrayClass:()Z
            ifeq 1
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         1: .line 748
      StackMap locals:
      StackMap stack:
            aload 2 /* lookupConstructor */
            aload 0 /* receiver */
            aload 0 /* receiver */
            invokevirtual com.oracle.truffle.polyglot.HostObject.asClass:()Ljava/lang/Class;
            invokevirtual com.oracle.truffle.polyglot.HostObject$LookupConstructorNode.execute:(Lcom/oracle/truffle/polyglot/HostObject;Ljava/lang/Class;)Lcom/oracle/truffle/polyglot/HostMethodDesc;
            astore 5 /* constructor */
        start local 5 // com.oracle.truffle.polyglot.HostMethodDesc constructor
         2: .line 749
            aload 5 /* constructor */
            ifnull 4
         3: .line 750
            aload 3 /* executeMethod */
            aload 5 /* constructor */
            aconst_null
            aload 1 /* arguments */
            aload 0 /* receiver */
            getfield com.oracle.truffle.polyglot.HostObject.languageContext:Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;
            invokevirtual com.oracle.truffle.polyglot.HostExecuteNode.execute:(Lcom/oracle/truffle/polyglot/HostMethodDesc;Ljava/lang/Object;[Ljava/lang/Object;Lcom/oracle/truffle/polyglot/PolyglotLanguageContext;)Ljava/lang/Object;
            areturn
         4: .line 752
      StackMap locals: com.oracle.truffle.polyglot.HostMethodDesc
      StackMap stack:
            aload 4 /* error */
            invokevirtual com.oracle.truffle.api.profiles.BranchProfile.enter:()V
         5: .line 753
            invokestatic com.oracle.truffle.api.interop.UnsupportedMessageException.create:()Lcom/oracle/truffle/api/interop/UnsupportedMessageException;
            athrow
        end local 5 // com.oracle.truffle.polyglot.HostMethodDesc constructor
        end local 4 // com.oracle.truffle.api.profiles.BranchProfile error
        end local 3 // com.oracle.truffle.polyglot.HostExecuteNode executeMethod
        end local 2 // com.oracle.truffle.polyglot.HostObject$LookupConstructorNode lookupConstructor
        end local 1 // java.lang.Object[] arguments
        end local 0 // com.oracle.truffle.polyglot.HostObject receiver
      LocalVariableTable:
        Start  End  Slot               Name  Signature
            0    6     0           receiver  Lcom/oracle/truffle/polyglot/HostObject;
            0    6     1          arguments  [Ljava/lang/Object;
            0    6     2  lookupConstructor  Lcom/oracle/truffle/polyglot/HostObject$LookupConstructorNode;
            0    6     3      executeMethod  Lcom/oracle/truffle/polyglot/HostExecuteNode;
            0    6     4              error  Lcom/oracle/truffle/api/profiles/BranchProfile;
            2    6     5        constructor  Lcom/oracle/truffle/polyglot/HostMethodDesc;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedMessageException, com.oracle.truffle.api.interop.UnsupportedTypeException, com.oracle.truffle.api.interop.ArityException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.dsl.Specialization(guards = {"receiver.isDefaultClass()"})
    RuntimeInvisibleParameterAnnotations: 
      0:
      1:
      2:
        com.oracle.truffle.api.dsl.Cached$Shared(value = "lookupConstructor")
        com.oracle.truffle.api.dsl.Cached()
      3:
        com.oracle.truffle.api.dsl.Cached$Shared(value = "hostExecute")
        com.oracle.truffle.api.dsl.Cached()
      4:
        com.oracle.truffle.api.dsl.Cached$Shared(value = "error")
        com.oracle.truffle.api.dsl.Cached()
    MethodParameters:
                   Name  Flags
      receiver           
      arguments          
      lookupConstructor  
      executeMethod      
      error              
}
SourceFile: "HostObject.java"
NestHost: com.oracle.truffle.polyglot.HostObject
InnerClasses:
  public abstract Shared = com.oracle.truffle.api.dsl.Cached$Shared of com.oracle.truffle.api.dsl.Cached
  Instantiate = com.oracle.truffle.polyglot.HostObject$Instantiate of com.oracle.truffle.polyglot.HostObject
  abstract LookupConstructorNode = com.oracle.truffle.polyglot.HostObject$LookupConstructorNode of com.oracle.truffle.polyglot.HostObject
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()