https://source.android.com/ 
public interface android.provider.ContactsContract$PhotoFilesColumns
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: android.provider.ContactsContract$PhotoFilesColumns
  super_class: java.lang.Object
{
  public static final java.lang.String HEIGHT;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "height"

  public static final java.lang.String WIDTH;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "width"

  public static final java.lang.String FILESIZE;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "filesize"
}
SourceFile: "ContactsContract.java"
NestHost: android.provider.ContactsContract
InnerClasses:
  protected abstract PhotoFilesColumns = android.provider.ContactsContract$PhotoFilesColumns of android.provider.ContactsContract