PHP-CS-Fixer/.composer-require-checker.json

{
    "symbol-whitelist" : [
        "PhpCsFixer\\PhpunitConstraintIsIdenticalString\\Constraint\\IsIdenticalString",
        "PhpCsFixer\\Tests\\Test\\Constraint\\SameStringsConstraint",
        "PhpCsFixer\\Tests\\Test\\IsIdenticalConstraint",
        "PHPUnit\\Framework\\Constraint\\IsIdentical",
        "PHPUnit\\Framework\\TestCase",
        "PHPUnit\\Runner\\Version",
        "PHPUnitGoodPractices\\Polyfill\\PolyfillTrait",
        "PHPUnitGoodPractices\\Traits\\ExpectationViaCodeOverAnnotationTrait",
        "PHPUnitGoodPractices\\Traits\\ExpectOverSetExceptionTrait",
        "PHPUnitGoodPractices\\Traits\\IdentityOverEqualityTrait",
        "PHPUnitGoodPractices\\Traits\\ProphecyOverMockObjectTrait",
        "PHPUnitGoodPractices\\Traits\\ProphesizeOnlyInterfaceTrait",
        "Prophecy\\Argument",
        "Symfony\\Component\\EventDispatcher\\Event",
        "Symfony\\Contracts\\EventDispatcher\\Event",
        "Symfony\\Contracts\\EventDispatcher\\EventDispatcherInterface",

        "null", "true", "false",
        "static", "self", "parent",
        "array", "string", "int", "float", "bool", "iterable", "callable", "void",
        "T_COALESCE_EQUAL",
        "T_FN",
        "T_MATCH",
        "T_NAME_FULLY_QUALIFIED",
        "T_NAME_QUALIFIED",
        "T_NAME_RELATIVE"
    ],
    "php-core-extensions" : [
        "dom", "mbstring", "Phar",
        "Core", "date", "pcre", "Reflection", "SPL", "standard"
    ]
}