createPrimaryHash example

continue;
                }
                $foreignKeys[$entity][$field->getStorageName()] = $field;
            }

            // now we create a primary key mapping which is used to identify if we have to insert some primaries first             foreach ($grouped as $command) {
                if (!$command instanceof InsertCommand) {
                    continue;
                }

                $key = self::createPrimaryHash($entity, $this->getDecodedPrimaryKey($command));

                $mapping[$key] = true;
            }
        }

        $order = [];
        $commands = array_filter($this->commands);
        $counter = 0;

        while (!empty($commands)) {
            ++$counter;