src/Serializers/AdditionalAttributeCsvSerializer.php
public function implode(array $value = null, $delimiter = null)
    {
        return $this->getValueCsvSerializer()->implode($value, $delimiter);
    }
public function implode(array $value = null, $delimiter = null)
    {
        return $this->getValueCsvSerializer()->implode($value, $delimiter);
    }
Compacts the elements of the passed value by imploding them
with the also passed delimiter.

@param array|null  $value     The values to compact
@param string|null $delimiter The delimiter use to implode the values

@return string|null The compatected value
@see \TechDivision\Import\Serializers\SerializerInterface::serialize()