https://openjdk.java.net/ 
public interface javax.swing.ComboBoxModel<E> extends javax.swing.ListModel<E>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.swing.ComboBoxModel
  super_class: java.lang.Object
{
  public abstract void setSelectedItem(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      anItem  

  public abstract java.lang.Object getSelectedItem();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
Signature: <E:Ljava/lang/Object;>Ljava/lang/Object;Ljavax/swing/ListModel<TE;>;
SourceFile: "ComboBoxModel.java"