Documented useHeaderBytesForContentType
diff --git a/lib/src/static_handler.dart b/lib/src/static_handler.dart
index 2f5cdbf..725c438 100644
--- a/lib/src/static_handler.dart
+++ b/lib/src/static_handler.dart
@@ -27,6 +27,11 @@
///
/// If no [defaultDocument] is found and [listDirectories] is true, then the
/// handler produces a listing of the directory.
+///
+/// If [useHeaderBytesForContentType] is set to false, then the content type will
+/// be determined by the file's extension, as is the mime library's default behavior.
+/// Setting it to true will cause up tot he first 25 bytes of the file to be read
+/// and used to determine the content type.
Handler createStaticHandler(String fileSystemPath,
{bool serveFilesOutsidePath: false, String defaultDocument,
bool listDirectories: false, bool useHeaderBytesForContentType: false}) {
