https://source.android.com/ 
public interface android.webkit.DownloadListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.webkit.DownloadListener
  super_class: java.lang.Object
{
  public abstract void onDownloadStart(java.lang.String, java.lang.String, java.lang.String, java.lang.String, long);
    descriptor: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;J)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
                    Name  Flags
      url                 
      userAgent           
      contentDisposition  
      mimetype            
      contentLength       
}
SourceFile: "DownloadListener.java"