src/Configuration/ActionConfiguration.php
private function getFieldsNormalizer()
    {
        return function(Options $options, $fields) {
            $normalizedFields = [];

            foreach ($fields as $name => $field) {
                if (null === $field) {
                    $field = [];
                }

                $normalizedFields[$name] = $field;
            }

            return $normalizedFields;
        };
    }
private function getFieldsNormalizer()
    {
        return function(Options $options, $fields) {
            $normalizedFields = [];

            foreach ($fields as $name => $field) {
                if (null === $field) {
                    $field = [];
                }

                $normalizedFields[$name] = $field;
            }

            return $normalizedFields;
        };
    }
private function getFieldsNormalizer ( ) { return function ( Options $ options , $ fields ) { $ normalizedFields = [ ] ; foreach ( $ fields as $ name => $ field ) { if ( null === $ field ) { $ field = [ ] ; } $ normalizedFields [ $ name ] = $ field ; } return $ normalizedFields ; } ; }
Return the field normalizer. It will transform null configuration into array to allow field type guessing
working.

@return Closure
Return the field normalizer . It will transform null configuration into array to allow field type guessing working .