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

  public static final java.lang.String _COUNT;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "_count"
}
SourceFile: "BaseColumns.java"