public function isNullable(string $fieldName) : bool
    {
        $mapping = $this->getFieldMapping($fieldName);
        return isset($mapping['nullable']) && $mapping['nullable'] === true;
    }
public function isNullable(string $fieldName) : bool
    {
        $mapping = $this->getFieldMapping($fieldName);
        return isset($mapping['nullable']) && $mapping['nullable'] === true;
    }
public function isNullable ( string $ fieldName ) : bool { $ mapping = $ this -> getFieldMapping ( $ fieldName ) ; return isset ( $ mapping [ 'nullable' ] ) && $ mapping [ 'nullable' ] === true ; }
Check if the field is not null.
Check if the field is not null .