A path provider that wraps another path provider, and returns null if items aren't present in the index
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namespace Facebook\HHAPIDoc; final class IndexedPathProvider implements IPathProvider<?string> {...}
->__construct(Index $index, IPathProvider<?string> $paths) Create an instance
->__construct(Index $index, IPathProvider<?string> $paths)
->getPathForClass(string $class): ?string
->getPathForClassMethod(string $class, string $method): ?string
->getPathForFunction(string $function): ?string
->getPathForInterface(string $interface): ?string
->getPathForInterfaceMethod(string $interface, string $method): ?string
->getPathForOpaqueTypeAlias(string $name): ?string
->getPathForTrait(string $trait): ?string
->getPathForTraitMethod(string $trait, string $method): ?string
->getPathForTransparentTypeAlias(string $name): ?string