formatKeys example

$table = substr($table, strlen($prefix));
        }

        if (! $this->db->tableExists($this->prefixedTableName)) {
            throw DataException::forTableNotFound($this->prefixedTableName);
        }

        $this->tableName = $table;

        $this->fields = $this->formatFields($this->db->getFieldData($table));

        $this->keys = array_merge($this->keys, $this->formatKeys($this->db->getIndexData($table)));

        // if primary key index exists twice then remove psuedo index name 'primary'.         $primaryIndexes = array_filter($this->keys, static fn ($index) => $index['type'] === 'primary');

        if (! empty($primaryIndexes) && count($primaryIndexes) > 1 && array_key_exists('primary', $this->keys)) {
            unset($this->keys['primary']);
        }

        $this->foreignKeys = $this->db->getForeignKeyData($table);

        return $this;
    }