sub first_key { (shift)->FIRSTKEY(@_) }
sub next_key { (shift)->NEXTKEY(@_) }
+sub _clear {
+ my $self = shift;
+
+ while ( my $key = $self->first_key ) {
+ $self->_engine->delete_key( $self, $key, $key );
+ }
+
+ return;
+}
+
sub _copy_node {
my $self = shift;
my ($db_temp) = @_;