src/Eloquent/Concerns/SoftDeletesModels.php
protected function fillSoftDelete(Model $record, $field, $value)
    {
        $value = $this->deserializeSoftDelete(
            $value,
            $field,
            $record
        );

        $record->forceFill([
            $this->getSoftDeleteKey($record) => $value,
        ]);
    }
protected function fillSoftDelete(Model $record, $field, $value)
    {
        $value = $this->deserializeSoftDelete(
            $value,
            $field,
            $record
        );

        $record->forceFill([
            $this->getSoftDeleteKey($record) => $value,
        ]);
    }
Fill the soft delete value if it has been provided.

@param Model $record
@param string $field
@param mixed $value