https://openjdk.java.net/ 
public interface jdk.internal.misc.JavaObjectInputStreamReadString
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.internal.misc.JavaObjectInputStreamReadString
  super_class: java.lang.Object
{
  public abstract java.lang.String readString(java.io.ObjectInputStream);
    descriptor: (Ljava/io/ObjectInputStream;)Ljava/lang/String;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      ois   
}
SourceFile: "JavaObjectInputStreamReadString.java"
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()