src/Utils/TypeComparators.php
public static function isEqualType(Type $typeA, Type $typeB)
    {
        // Equivalent types are equal.
        if ($typeA === $typeB) {
            return true;
        }

        // If either type is non-null, the other must also be non-null.
        if ($typeA instanceof NonNull && $typeB instanceof NonNull) {
            return self::isEqualType($typeA->getWrappedType(), $typeB->getWrappedType());
        }

        // If either type is a list, the other must also be a list.
        if ($typeA instanceof ListOfType && $typeB instanceof ListOfType) {
            return self::isEqualType($typeA->getWrappedType(), $typeB->getWrappedType());
        }

        // Otherwise the types are not equal.
        return false;
    }
public static function isEqualType(Type $typeA, Type $typeB)
    {
        // Equivalent types are equal.
        if ($typeA === $typeB) {
            return true;
        }

        // If either type is non-null, the other must also be non-null.
        if ($typeA instanceof NonNull && $typeB instanceof NonNull) {
            return self::isEqualType($typeA->getWrappedType(), $typeB->getWrappedType());
        }

        // If either type is a list, the other must also be a list.
        if ($typeA instanceof ListOfType && $typeB instanceof ListOfType) {
            return self::isEqualType($typeA->getWrappedType(), $typeB->getWrappedType());
        }

        // Otherwise the types are not equal.
        return false;
    }
public static function isEqualType ( Type $ typeA , Type $ typeB ) { // Equivalent types are equal. if ( $ typeA === $ typeB ) { return true ; } // If either type is non-null, the other must also be non-null. if ( $ typeA instanceof NonNull && $ typeB instanceof NonNull ) { return self :: isEqualType ( $ typeA -> getWrappedType ( ) , $ typeB -> getWrappedType ( ) ) ; } // If either type is a list, the other must also be a list. if ( $ typeA instanceof ListOfType && $ typeB instanceof ListOfType ) { return self :: isEqualType ( $ typeA -> getWrappedType ( ) , $ typeB -> getWrappedType ( ) ) ; } // Otherwise the types are not equal. return false ; }
Provided two types, return true if the types are equal (invariant).

@return bool
Provided two types return true if the types are equal ( invariant ) .