https://www.graalvm.org/ 
public final class com.oracle.svm.truffle.nfi.posix.PosixTruffleNFIFeature implements org.graalvm.nativeimage.hosted.Feature
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.oracle.svm.truffle.nfi.posix.PosixTruffleNFIFeature
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.truffle.nfi.posix.PosixTruffleNFIFeature this
         0: .line 56
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.svm.truffle.nfi.posix.PosixTruffleNFIFeature this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/truffle/nfi/posix/PosixTruffleNFIFeature;

  public void duringSetup(org.graalvm.nativeimage.hosted.Feature$DuringSetupAccess);
    descriptor: (Lorg/graalvm/nativeimage/hosted/Feature$DuringSetupAccess;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // com.oracle.svm.truffle.nfi.posix.PosixTruffleNFIFeature this
        start local 1 // org.graalvm.nativeimage.hosted.Feature$DuringSetupAccess access
         0: .line 60
            invokestatic com.oracle.svm.truffle.nfi.posix.PosixTruffleNFISupport.initialize:()V
         1: .line 61
            return
        end local 1 // org.graalvm.nativeimage.hosted.Feature$DuringSetupAccess access
        end local 0 // com.oracle.svm.truffle.nfi.posix.PosixTruffleNFIFeature this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lcom/oracle/svm/truffle/nfi/posix/PosixTruffleNFIFeature;
            0    2     1  access  Lorg/graalvm/nativeimage/hosted/Feature$DuringSetupAccess;
    MethodParameters:
        Name  Flags
      access  
}
SourceFile: "PosixTruffleNFIFeature.java"
InnerClasses:
  public abstract DuringSetupAccess = org.graalvm.nativeimage.hosted.Feature$DuringSetupAccess of org.graalvm.nativeimage.hosted.Feature
    RuntimeVisibleAnnotations: 
      com.oracle.svm.core.annotate.AutomaticFeature()
      org.graalvm.nativeimage.Platforms(value = {Lorg/graalvm/nativeimage/Platform$LINUX;, Lorg/graalvm/nativeimage/Platform$DARWIN;})