https://openjdk.java.net/ 
interface jdk.jshell.TaskFactory$SourceHandler<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.jshell.TaskFactory$SourceHandler
  super_class: java.lang.Object
{
  public abstract javax.tools.JavaFileObject sourceToFileObject(jdk.jshell.MemoryFileManager, T);
    descriptor: (Ljdk/jshell/MemoryFileManager;Ljava/lang/Object;)Ljavax/tools/JavaFileObject;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljdk/jshell/MemoryFileManager;TT;)Ljavax/tools/JavaFileObject;
    MethodParameters:
      Name  Flags
      fm    
      t     

  public abstract jdk.jshell.Diag diag(javax.tools.Diagnostic<? extends javax.tools.JavaFileObject>);
    descriptor: (Ljavax/tools/Diagnostic;)Ljdk/jshell/Diag;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljavax/tools/Diagnostic<+Ljavax/tools/JavaFileObject;>;)Ljdk/jshell/Diag;
    MethodParameters:
      Name  Flags
      d     
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "TaskFactory.java"
NestHost: jdk.jshell.TaskFactory
InnerClasses:
  private abstract SourceHandler = jdk.jshell.TaskFactory$SourceHandler of jdk.jshell.TaskFactory