https://www.graalvm.org/ 
class com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode extends com.oracle.truffle.js.nodes.function.AbstractFunctionArgumentsNode
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode
  super_class: com.oracle.truffle.js.nodes.function.AbstractFunctionArgumentsNode
{
  private com.oracle.truffle.js.nodes.JavaScriptNode child;
    descriptor: Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    flags: (0x0002) ACC_PRIVATE
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.nodes.Node$Child()

  protected void <init>(com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
        start local 1 // com.oracle.truffle.js.nodes.JavaScriptNode child
         0: .line 137
            aload 0 /* this */
            invokespecial com.oracle.truffle.js.nodes.function.AbstractFunctionArgumentsNode.<init>:()V
         1: .line 138
            aload 0 /* this */
            aload 1 /* child */
            putfield com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.child:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
         2: .line 139
            return
        end local 1 // com.oracle.truffle.js.nodes.JavaScriptNode child
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/oracle/truffle/js/nodes/function/JSFunctionOneArgumentNode;
            0    3     1  child  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
       Name  Flags
      child  

  public static com.oracle.truffle.js.nodes.function.AbstractFunctionArgumentsNode create(com.oracle.truffle.js.nodes.JavaScriptNode);
    descriptor: (Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Lcom/oracle/truffle/js/nodes/function/AbstractFunctionArgumentsNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.nodes.JavaScriptNode child
         0: .line 142
            new com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode
            dup
            aload 0 /* child */
            invokespecial com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.<init>:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
            areturn
        end local 0 // com.oracle.truffle.js.nodes.JavaScriptNode child
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  child  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
    MethodParameters:
       Name  Flags
      child  

  public static com.oracle.truffle.js.nodes.function.AbstractFunctionArgumentsNode create(com.oracle.truffle.js.nodes.JavaScriptNode, boolean);
    descriptor: (Lcom/oracle/truffle/js/nodes/JavaScriptNode;Z)Lcom/oracle/truffle/js/nodes/function/AbstractFunctionArgumentsNode;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.JavaScriptNode child
        start local 1 // boolean optimizeConstantArguments
         0: .line 146
            iload 1 /* optimizeConstantArguments */
            ifeq 2
         1: .line 147
            aload 0 /* child */
            invokestatic com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.create:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Lcom/oracle/truffle/js/nodes/function/AbstractFunctionArgumentsNode;
            areturn
         2: .line 149
      StackMap locals:
      StackMap stack:
            new com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode
            dup
            aload 0 /* child */
            invokespecial com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.<init>:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
            areturn
        end local 1 // boolean optimizeConstantArguments
        end local 0 // com.oracle.truffle.js.nodes.JavaScriptNode child
      LocalVariableTable:
        Start  End  Slot                       Name  Signature
            0    3     0                      child  Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            0    3     1  optimizeConstantArguments  Z
    MethodParameters:
                           Name  Flags
      child                      
      optimizeConstantArguments  

  public int getCount(com.oracle.truffle.api.frame.VirtualFrame);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
         0: .line 155
            iconst_1
            ireturn
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/js/nodes/function/JSFunctionOneArgumentNode;
            0    1     1  frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
    MethodParameters:
       Name  Flags
      frame  

  public java.lang.Object[] executeFillObjectArray(com.oracle.truffle.api.frame.VirtualFrame, java.lang.Object[], int);
    descriptor: (Lcom/oracle/truffle/api/frame/VirtualFrame;[Ljava/lang/Object;I)[Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
        start local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        start local 2 // java.lang.Object[] arguments
        start local 3 // int delta
         0: .line 160
            aload 2 /* arguments */
            iload 3 /* delta */
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.child:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* frame */
            invokevirtual com.oracle.truffle.js.nodes.JavaScriptNode.execute:(Lcom/oracle/truffle/api/frame/VirtualFrame;)Ljava/lang/Object;
            aastore
         1: .line 161
            aload 2 /* arguments */
            areturn
        end local 3 // int delta
        end local 2 // java.lang.Object[] arguments
        end local 1 // com.oracle.truffle.api.frame.VirtualFrame frame
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lcom/oracle/truffle/js/nodes/function/JSFunctionOneArgumentNode;
            0    2     1      frame  Lcom/oracle/truffle/api/frame/VirtualFrame;
            0    2     2  arguments  [Ljava/lang/Object;
            0    2     3      delta  I
    MethodParameters:
           Name  Flags
      frame      
      arguments  
      delta      

  protected com.oracle.truffle.js.nodes.function.AbstractFunctionArgumentsNode copyUninitialized(java.util.Set<java.lang.Class<? extends com.oracle.truffle.api.instrumentation.Tag>>);
    descriptor: (Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/function/AbstractFunctionArgumentsNode;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
        start local 1 // java.util.Set materializedTags
         0: .line 166
            new com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.child:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            aload 1 /* materializedTags */
            invokestatic com.oracle.truffle.js.nodes.JavaScriptNode.cloneUninitialized:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;Ljava/util/Set;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokespecial com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.<init>:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)V
            areturn
        end local 1 // java.util.Set materializedTags
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0    1     0              this  Lcom/oracle/truffle/js/nodes/function/JSFunctionOneArgumentNode;
            0    1     1  materializedTags  Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;
    Signature: (Ljava/util/Set<Ljava/lang/Class<+Lcom/oracle/truffle/api/instrumentation/Tag;>;>;)Lcom/oracle/truffle/js/nodes/function/AbstractFunctionArgumentsNode;
    MethodParameters:
                  Name  Flags
      materializedTags  

  public void materializeInstrumentableArguments();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
         0: .line 171
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.child:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokevirtual com.oracle.truffle.js.nodes.JavaScriptNode.isInstrumentable:()Z
            ifne 2
         1: .line 172
            aload 0 /* this */
            aload 0 /* this */
            aload 0 /* this */
            getfield com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.child:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokestatic com.oracle.truffle.js.nodes.instrumentation.JSInputGeneratingNodeWrapper.create:(Lcom/oracle/truffle/js/nodes/JavaScriptNode;)Lcom/oracle/truffle/js/nodes/JavaScriptNode;
            invokevirtual com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.insert:(Lcom/oracle/truffle/api/nodes/Node;)Lcom/oracle/truffle/api/nodes/Node;
            checkcast com.oracle.truffle.js.nodes.JavaScriptNode
            putfield com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode.child:Lcom/oracle/truffle/js/nodes/JavaScriptNode;
         2: .line 174
      StackMap locals:
      StackMap stack:
            return
        end local 0 // com.oracle.truffle.js.nodes.function.JSFunctionOneArgumentNode this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/js/nodes/function/JSFunctionOneArgumentNode;
}
SourceFile: "JSFunctionArgumentsNode.java"
InnerClasses:
  public abstract Child = com.oracle.truffle.api.nodes.Node$Child of com.oracle.truffle.api.nodes.Node