public function upsert_set( array $models = [] ) {
		if ( ! count( $models ) ) {
			return 0;
		}

		global $wpdb;
		$table          = $wpdb->prefix . $this->model->table_name();
		$primary_key    = $this->model->primary_key_name();
		$expected_count = count( $models );
		$keys           = wp_list_pluck( $models, $primary_key );

		$deleted = 0;
		do {
			$batch         = array_splice( $keys, 0, $this->batch_size );
			$keys_interval = implode( ',', array_map( 'absint', $batch ) );
			$deleted       += $wpdb->query( "DELETE FROM {$table} WHERE {$primary_key} IN ({$keys_interval})" );
		} while ( count( $keys ) );

		if ( $deleted !== $expected_count ) {
			// There might be legit reasons, like another process running on the same table, but let's log it.
			do_action( 'tribe_log', 'warning', 'Mismatching number of deletions.', [
				'source'      => __CLASS__,
				'slug'        => 'delete-in-upsert-set',
				'table'       => $table,
				'primary_key' => $primary_key,
				'expected'    => $expected_count,
				'deleted'     => $inserted,
			] );
		}

		$updates = $models;
		// Here we make the assumptions the models will not be mixed bag, but either all arrays or all Models.
		if ( ! is_array( reset( $models ) ) ) {
			$updates = array_map( static function ( Model $model ) {
				return $model->to_array();
			}, $models );
		}

		$inserted = $this->insert( $updates );

		if ( $inserted !== $expected_count ) {
			// There might be legit reasons, like another process running on the same table, but let's log it.
			do_action( 'tribe_log', 'warning', 'Mismatching number of insertions.', [
				'source'      => __CLASS__,
				'slug'        => 'delete-in-upsert-set',
				'table'       => $table,
				'primary_key' => $primary_key,
				'expected'    => $expected_count,
				'inserted'    => $inserted,
			] );
		}

		return $inserted;
	}