+=attr uuid
+
+128-bit UUID identifying the group within the database.
+
+=attr name
+
+The human-readable name of the group.
+
+=attr notes
+
+Free form text string associated with the group.
+
+=attr tags
+
+Text string with arbitrary tags which can be used to build a taxonomy.
+
+=attr icon_id
+
+Integer representing a default icon. See L<File::KDBX::Constants/":icon"> for valid values.
+
+=attr custom_icon_uuid
+
+128-bit UUID identifying a custom icon within the database.
+
+=attr is_expanded
+
+Whether or not subgroups are visible when listed for user selection.
+
+=attr default_auto_type_sequence
+
+The default auto-type keystroke sequence, inheritable by entries and subgroups.
+
+=attr enable_auto_type
+
+Whether or not the entry is eligible to be matched for auto-typing, inheritable by entries and subgroups.
+
+=attr enable_searching
+
+Whether or not entries within the group can show up in search results, inheritable by subgroups.
+
+=attr last_top_visible_entry
+
+The UUID of the entry visible at the top of the list.
+
+=attr custom_data
+
+A set of key-value pairs used to store arbitrary data, usually used by software to keep track of state rather
+than by end users (who typically work with the strings and binaries).
+
+=attr previous_parent_group
+
+128-bit UUID identifying a group within the database.
+
+=attr entries
+
+Array of entries contained within the group.
+
+=attr groups
+
+Array of subgroups contained within the group.
+
+=attr last_modification_time
+
+Date and time when the entry was last modified.
+
+=attr creation_time
+
+Date and time when the entry was created.
+
+=attr last_access_time
+
+Date and time when the entry was last accessed.
+
+=attr expiry_time
+
+Date and time when the entry expired or will expire.
+
+=attr expires
+
+Boolean value indicating whether or not an entry is expired.
+
+=attr usage_count
+
+TODO
+
+=attr location_changed
+
+Date and time when the entry was last moved to a different parent group.
+
+=cut
+
+# has uuid => sub { generate_uuid(printable => 1) };
+has name => '', coerce => \&to_string;
+has notes => '', coerce => \&to_string;
+has tags => '', coerce => \&to_string;
+has icon_id => ICON_FOLDER, coerce => \&to_icon_constant;
+has custom_icon_uuid => undef, coerce => \&to_uuid;
+has is_expanded => false, coerce => \&to_bool;
+has default_auto_type_sequence => '', coerce => \&to_string;
+has enable_auto_type => undef, coerce => \&to_tristate;
+has enable_searching => undef, coerce => \&to_tristate;
+has last_top_visible_entry => undef, coerce => \&to_uuid;
+# has custom_data => {};
+has previous_parent_group => undef, coerce => \&to_uuid;
+# has entries => [];
+# has groups => [];
+has times => {};
+
+has last_modification_time => sub { gmtime }, store => 'times', coerce => \&to_time;
+has creation_time => sub { gmtime }, store => 'times', coerce => \&to_time;
+has last_access_time => sub { gmtime }, store => 'times', coerce => \&to_time;
+has expiry_time => sub { gmtime }, store => 'times', coerce => \&to_time;
+has expires => false, store => 'times', coerce => \&to_bool;
+has usage_count => 0, store => 'times', coerce => \&to_number;
+has location_changed => sub { gmtime }, store => 'times', coerce => \&to_time;
+