https://www.graalvm.org/ 
public interface org.graalvm.compiler.truffle.jfr.RootFunctionEvent extends org.graalvm.compiler.truffle.jfr.Event
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.graalvm.compiler.truffle.jfr.RootFunctionEvent
  super_class: java.lang.Object
{
  public abstract void setRootFunction(com.oracle.truffle.api.RootCallTarget);
    descriptor: (Lcom/oracle/truffle/api/RootCallTarget;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      target  
}
SourceFile: "RootFunctionEvent.java"