private function subfieldConflicts(
        array $conflicts,
        $responseName,
        FieldNode $ast1,
        FieldNode $ast2
    ) {
        if (count($conflicts) === 0) {
            return null;
        }

        return [
            [
                $responseName,
                array_map(
                    static function ($conflict) {
                        return $conflict[0];
                    },
                    $conflicts
                ),
            ],
            array_reduce(
                $conflicts,
                static function ($allFields, $conflict) {
                    return array_merge($allFields, $conflict[1]);
                },
                [$ast1]
            ),
            array_reduce(
                $conflicts,
                static function ($allFields, $conflict) {
                    return array_merge($allFields, $conflict[2]);
                },
                [$ast2]
            ),
        ];
    }
private function subfieldConflicts(
        array $conflicts,
        $responseName,
        FieldNode $ast1,
        FieldNode $ast2
    ) {
        if (count($conflicts) === 0) {
            return null;
        }

        return [
            [
                $responseName,
                array_map(
                    static function ($conflict) {
                        return $conflict[0];
                    },
                    $conflicts
                ),
            ],
            array_reduce(
                $conflicts,
                static function ($allFields, $conflict) {
                    return array_merge($allFields, $conflict[1]);
                },
                [$ast1]
            ),
            array_reduce(
                $conflicts,
                static function ($allFields, $conflict) {
                    return array_merge($allFields, $conflict[2]);
                },
                [$ast2]
            ),
        ];
    }
private function subfieldConflicts ( array $ conflicts , $ responseName , FieldNode $ ast1 , FieldNode $ ast2 ) { if ( count ( $ conflicts ) === 0 ) { return null ; } return [ [ $ responseName , array_map ( static function ( $ conflict ) { return $ conflict [ 0 ] ; } , $ conflicts ) , ] , array_reduce ( $ conflicts , static function ( $ allFields , $ conflict ) { return array_merge ( $ allFields , $ conflict [ 1 ] ) ; } , [ $ ast1 ] ) , array_reduce ( $ conflicts , static function ( $ allFields , $ conflict ) { return array_merge ( $ allFields , $ conflict [ 2 ] ) ; } , [ $ ast2 ] ) , ] ; }
Given a series of Conflicts which occurred between two sub-fields, generate
a single Conflict.

@param mixed[][] $conflicts
@param string    $responseName

@return mixed[]|null
Given a series of Conflicts which occurred between two sub - fields generate a single Conflict .