Namespace Java.Nio.File.Spi Classes FileSystemProvider https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/file/spi/FileSystemProvider.html FileTypeDetector https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/nio/file/spi/FileTypeDetector.html