https://openjdk.java.net/ 
public interface javax.activation.CommandObject
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.activation.CommandObject
  super_class: java.lang.Object
{
  public abstract void setCommandContext(java.lang.String, javax.activation.DataHandler);
    descriptor: (Ljava/lang/String;Ljavax/activation/DataHandler;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      verb  
      dh    
}
SourceFile: "CommandObject.java"