https://www.graalvm.org/ 
public interface com.oracle.graal.python.parser.CellFrameSlotSupplier
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.graal.python.parser.CellFrameSlotSupplier
  super_class: java.lang.Object
{
  public abstract com.oracle.truffle.api.frame.FrameSlot[] getCellVarSlots();
    descriptor: ()[Lcom/oracle/truffle/api/frame/FrameSlot;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.oracle.truffle.api.frame.FrameSlot[] getFreeVarSlots();
    descriptor: ()[Lcom/oracle/truffle/api/frame/FrameSlot;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.oracle.truffle.api.frame.FrameSlot[] getFreeVarDefinitionSlots();
    descriptor: ()[Lcom/oracle/truffle/api/frame/FrameSlot;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "CellFrameSlotSupplier.java"