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

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

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

  public static final java.lang.String STATE;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "state"
}
SourceFile: "ContactsContract.java"
NestHost: android.provider.ContactsContract
InnerClasses:
  protected abstract MetadataSyncStateColumns = android.provider.ContactsContract$MetadataSyncStateColumns of android.provider.ContactsContract
    RuntimeVisibleAnnotations: 
      android.annotation.SystemApi()