src/Fixer/FunctionNotation/ReturnTypeDeclarationFixer.php
public function getDefinition()
    {
        $versionSpecification = new VersionSpecification(70000);

        return new FixerDefinition(
            'There should be one or no space before colon, and one space after it in return type declarations, according to configuration.',
            [
                new VersionSpecificCodeSample(
                    "<?php\nfunction foo(int \$a):string {};\n",
                    $versionSpecification
                ),
                new VersionSpecificCodeSample(
                    "<?php\nfunction foo(int \$a):string {};\n",
                    $versionSpecification,
                    ['space_before' => 'none']
                ),
                new VersionSpecificCodeSample(
                    "<?php\nfunction foo(int \$a):string {};\n",
                    $versionSpecification,
                    ['space_before' => 'one']
                ),
            ],
            'Rule is applied only in a PHP 7+ environment.'
        );
    }
public function getDefinition()
    {
        $versionSpecification = new VersionSpecification(70000);

        return new FixerDefinition(
            'There should be one or no space before colon, and one space after it in return type declarations, according to configuration.',
            [
                new VersionSpecificCodeSample(
                    "<?php\nfunction foo(int \$a):string {};\n",
                    $versionSpecification
                ),
                new VersionSpecificCodeSample(
                    "<?php\nfunction foo(int \$a):string {};\n",
                    $versionSpecification,
                    ['space_before' => 'none']
                ),
                new VersionSpecificCodeSample(
                    "<?php\nfunction foo(int \$a):string {};\n",
                    $versionSpecification,
                    ['space_before' => 'one']
                ),
            ],
            'Rule is applied only in a PHP 7+ environment.'
        );
    }
{@inheritdoc}