https://www.graalvm.org/ 
public class com.oracle.truffle.nfi.test.NullArrayNFITest extends com.oracle.truffle.nfi.test.NFITest
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.oracle.truffle.nfi.test.NullArrayNFITest
  super_class: com.oracle.truffle.nfi.test.NFITest
{
  public com.oracle.truffle.nfi.spi.types.NativeSimpleType nativeType;
    descriptor: Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
    flags: (0x0001) ACC_PUBLIC
    RuntimeVisibleAnnotations: 
      org.junit.runners.Parameterized$Parameter()

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.nfi.test.NullArrayNFITest this
         0: .line 62
            aload 0 /* this */
            invokespecial com.oracle.truffle.nfi.test.NFITest.<init>:()V
            return
        end local 0 // com.oracle.truffle.nfi.test.NullArrayNFITest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/nfi/test/NullArrayNFITest;

  public static java.util.Collection<java.lang.Object[]> data();
    descriptor: ()Ljava/util/Collection;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=0
         0: .line 66
            new java.util.ArrayList
            dup
            invokespecial java.util.ArrayList.<init>:()V
            astore 0 /* ret */
        start local 0 // java.util.ArrayList ret
         1: .line 67
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.UINT8:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         2: .line 68
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.SINT8:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         3: .line 69
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.UINT16:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         4: .line 70
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.SINT16:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         5: .line 71
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.UINT32:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         6: .line 72
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.SINT32:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         7: .line 73
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.UINT64:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         8: .line 74
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.SINT64:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         9: .line 75
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.FLOAT:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
        10: .line 76
            aload 0 /* ret */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            getstatic com.oracle.truffle.nfi.spi.types.NativeSimpleType.DOUBLE:Lcom/oracle/truffle/nfi/spi/types/NativeSimpleType;
            aastore
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
        11: .line 77
            aload 0 /* ret */
            areturn
        end local 0 // java.util.ArrayList ret
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            1   12     0   ret  Ljava/util/ArrayList<[Ljava/lang/Object;>;
    Signature: ()Ljava/util/Collection<[Ljava/lang/Object;>;
    RuntimeVisibleAnnotations: 
      org.junit.runners.Parameterized$Parameters(name = "{0}")

  public void testNullArray(com.oracle.truffle.api.CallTarget);
    descriptor: (Lcom/oracle/truffle/api/CallTarget;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=2
        start local 0 // com.oracle.truffle.nfi.test.NullArrayNFITest this
        start local 1 // com.oracle.truffle.api.CallTarget target
         0: .line 91
            aload 1 /* target */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            new com.oracle.truffle.nfi.test.interop.NullObject
            dup
            invokespecial com.oracle.truffle.nfi.test.interop.NullObject.<init>:()V
            aastore
            invokeinterface com.oracle.truffle.api.CallTarget.call:([Ljava/lang/Object;)Ljava/lang/Object;
            astore 2 /* ret */
        start local 2 // java.lang.Object ret
         1: .line 93
            ldc "isBoxed"
            getstatic com.oracle.truffle.nfi.test.NullArrayNFITest.UNCACHED_INTEROP:Lcom/oracle/truffle/api/interop/InteropLibrary;
            aload 2 /* ret */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.isString:(Ljava/lang/Object;)Z
            invokestatic org.junit.Assert.assertTrue:(Ljava/lang/String;Z)V
         2: .line 94
            ldc "return value"
            ldc "null"
            getstatic com.oracle.truffle.nfi.test.NullArrayNFITest.UNCACHED_INTEROP:Lcom/oracle/truffle/api/interop/InteropLibrary;
            aload 2 /* ret */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.asString:(Ljava/lang/Object;)Ljava/lang/String;
            invokestatic org.junit.Assert.assertEquals:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
         3: .line 95
            return
        end local 2 // java.lang.Object ret
        end local 1 // com.oracle.truffle.api.CallTarget target
        end local 0 // com.oracle.truffle.nfi.test.NullArrayNFITest this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/oracle/truffle/nfi/test/NullArrayNFITest;
            0    4     1  target  Lcom/oracle/truffle/api/CallTarget;
            1    4     2     ret  Ljava/lang/Object;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedMessageException
    RuntimeVisibleAnnotations: 
      org.junit.Test()
    RuntimeVisibleParameterAnnotations: 
      0:
        com.oracle.truffle.tck.TruffleRunner$Inject(value = Lcom/oracle/truffle/nfi/test/NullArrayNFITest$NullArrayNode;)
    MethodParameters:
        Name  Flags
      target  

  public void testHostNullArray(com.oracle.truffle.api.CallTarget);
    descriptor: (Lcom/oracle/truffle/api/CallTarget;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // com.oracle.truffle.nfi.test.NullArrayNFITest this
        start local 1 // com.oracle.truffle.api.CallTarget target
         0: .line 99
            getstatic com.oracle.truffle.nfi.test.NullArrayNFITest.runWithPolyglot:Lcom/oracle/truffle/tck/TruffleRunner$RunWithPolyglotRule;
            invokevirtual com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule.getTruffleTestEnv:()Lcom/oracle/truffle/api/TruffleLanguage$Env;
            aconst_null
            invokevirtual com.oracle.truffle.api.TruffleLanguage$Env.asGuestValue:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 2 /* hostNull */
        start local 2 // java.lang.Object hostNull
         1: .line 100
            aload 1 /* target */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 2 /* hostNull */
            aastore
            invokeinterface com.oracle.truffle.api.CallTarget.call:([Ljava/lang/Object;)Ljava/lang/Object;
            astore 3 /* ret */
        start local 3 // java.lang.Object ret
         2: .line 102
            ldc "isBoxed"
            getstatic com.oracle.truffle.nfi.test.NullArrayNFITest.UNCACHED_INTEROP:Lcom/oracle/truffle/api/interop/InteropLibrary;
            aload 3 /* ret */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.isString:(Ljava/lang/Object;)Z
            invokestatic org.junit.Assert.assertTrue:(Ljava/lang/String;Z)V
         3: .line 103
            ldc "return value"
            ldc "null"
            getstatic com.oracle.truffle.nfi.test.NullArrayNFITest.UNCACHED_INTEROP:Lcom/oracle/truffle/api/interop/InteropLibrary;
            aload 3 /* ret */
            invokevirtual com.oracle.truffle.api.interop.InteropLibrary.asString:(Ljava/lang/Object;)Ljava/lang/String;
            invokestatic org.junit.Assert.assertEquals:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
         4: .line 104
            return
        end local 3 // java.lang.Object ret
        end local 2 // java.lang.Object hostNull
        end local 1 // com.oracle.truffle.api.CallTarget target
        end local 0 // com.oracle.truffle.nfi.test.NullArrayNFITest this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Lcom/oracle/truffle/nfi/test/NullArrayNFITest;
            0    5     1    target  Lcom/oracle/truffle/api/CallTarget;
            1    5     2  hostNull  Ljava/lang/Object;
            2    5     3       ret  Ljava/lang/Object;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnsupportedMessageException
    RuntimeVisibleAnnotations: 
      org.junit.Test()
    RuntimeVisibleParameterAnnotations: 
      0:
        com.oracle.truffle.tck.TruffleRunner$Inject(value = Lcom/oracle/truffle/nfi/test/NullArrayNFITest$NullArrayNode;)
    MethodParameters:
        Name  Flags
      target  
}
SourceFile: "NullArrayNFITest.java"
NestMembers:
  com.oracle.truffle.nfi.test.NullArrayNFITest$NullArrayNode
InnerClasses:
  public final Env = com.oracle.truffle.api.TruffleLanguage$Env of com.oracle.truffle.api.TruffleLanguage
  public NullArrayNode = com.oracle.truffle.nfi.test.NullArrayNFITest$NullArrayNode of com.oracle.truffle.nfi.test.NullArrayNFITest
  public abstract Inject = com.oracle.truffle.tck.TruffleRunner$Inject of com.oracle.truffle.tck.TruffleRunner
  public final RunWithPolyglotRule = com.oracle.truffle.tck.TruffleRunner$RunWithPolyglotRule of com.oracle.truffle.tck.TruffleRunner
  public abstract Parameter = org.junit.runners.Parameterized$Parameter of org.junit.runners.Parameterized
  public abstract Parameters = org.junit.runners.Parameterized$Parameters of org.junit.runners.Parameterized
  public abstract UseParametersRunnerFactory = org.junit.runners.Parameterized$UseParametersRunnerFactory of org.junit.runners.Parameterized
    RuntimeVisibleAnnotations: 
      org.junit.runner.RunWith(value = Lorg/junit/runners/Parameterized;)
      org.junit.runners.Parameterized$UseParametersRunnerFactory(value = Lcom/oracle/truffle/tck/TruffleRunner$ParametersFactory;)