https://www.graalvm.org/ 
public interface org.graalvm.nativeimage.Platform$WINDOWS extends org.graalvm.nativeimage.impl.InternalPlatform$PLATFORM_JNI
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.nativeimage.Platform$WINDOWS
  super_class: java.lang.Object
{
  public java.lang.String getOS();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.nativeimage.Platform$WINDOWS this
         0: .line 233
            ldc "windows"
            areturn
        end local 0 // org.graalvm.nativeimage.Platform$WINDOWS this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/nativeimage/Platform$WINDOWS;
}
SourceFile: "Platform.java"
NestHost: org.graalvm.nativeimage.Platform
InnerClasses:
  public abstract WINDOWS = org.graalvm.nativeimage.Platform$WINDOWS of org.graalvm.nativeimage.Platform
  public abstract PLATFORM_JNI = org.graalvm.nativeimage.impl.InternalPlatform$PLATFORM_JNI of org.graalvm.nativeimage.impl.InternalPlatform