https://www.graalvm.org/ 
class com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl implements com.oracle.svm.core.heap.PhysicalMemory$PhysicalMemorySupport
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl this
         0: .line 40
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/core/windows/WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl;

  public org.graalvm.word.UnsignedWord size();
    descriptor: ()Lorg/graalvm/word/UnsignedWord;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl this
         0: .line 44
            ldc Lcom/oracle/svm/core/windows/headers/SysinfoAPI$MEMORYSTATUSEX;
            invokestatic org.graalvm.nativeimage.StackValue.get:(Ljava/lang/Class;)Lorg/graalvm/word/PointerBase;
            checkcast com.oracle.svm.core.windows.headers.SysinfoAPI$MEMORYSTATUSEX
            astore 1 /* memStatusEx */
        start local 1 // com.oracle.svm.core.windows.headers.SysinfoAPI$MEMORYSTATUSEX memStatusEx
         1: .line 45
            aload 1 /* memStatusEx */
            ldc Lcom/oracle/svm/core/windows/headers/SysinfoAPI$MEMORYSTATUSEX;
            invokestatic org.graalvm.nativeimage.c.struct.SizeOf.get:(Ljava/lang/Class;)I
            invokeinterface com.oracle.svm.core.windows.headers.SysinfoAPI$MEMORYSTATUSEX.set_dwLength:(I)V
         2: .line 46
            aload 1 /* memStatusEx */
            invokestatic com.oracle.svm.core.windows.headers.SysinfoAPI.GlobalMemoryStatusEx:(Lcom/oracle/svm/core/windows/headers/SysinfoAPI$MEMORYSTATUSEX;)I
            pop
         3: .line 47
            aload 1 /* memStatusEx */
            invokeinterface com.oracle.svm.core.windows.headers.SysinfoAPI$MEMORYSTATUSEX.ullTotalPhys:()J
            invokestatic org.graalvm.word.WordFactory.unsigned:(J)Lorg/graalvm/word/UnsignedWord;
            areturn
        end local 1 // com.oracle.svm.core.windows.headers.SysinfoAPI$MEMORYSTATUSEX memStatusEx
        end local 0 // com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    4     0         this  Lcom/oracle/svm/core/windows/WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl;
            1    4     1  memStatusEx  Lcom/oracle/svm/core/windows/headers/SysinfoAPI$MEMORYSTATUSEX;
}
SourceFile: "WindowsPhysicalMemory.java"
NestHost: com.oracle.svm.core.windows.WindowsPhysicalMemory
InnerClasses:
  protected abstract PhysicalMemorySupport = com.oracle.svm.core.heap.PhysicalMemory$PhysicalMemorySupport of com.oracle.svm.core.heap.PhysicalMemory
  WindowsPhysicalMemorySupportImpl = com.oracle.svm.core.windows.WindowsPhysicalMemory$WindowsPhysicalMemorySupportImpl of com.oracle.svm.core.windows.WindowsPhysicalMemory
  public abstract MEMORYSTATUSEX = com.oracle.svm.core.windows.headers.SysinfoAPI$MEMORYSTATUSEX of com.oracle.svm.core.windows.headers.SysinfoAPI