diff --git a/internal/lsp/acmelsp/metadata.go b/internal/lsp/acmelsp/metadata.go
index 6b69b08..5e738ef 100644
--- a/internal/lsp/acmelsp/metadata.go
+++ b/internal/lsp/acmelsp/metadata.go
@@ -15,7 +15,6 @@ import (
 //metdata is implemented due to the https://github.com/OmniSharp/omnisharp-roslyn/issues/2238
 
 func convertFilePath(p string) (path string) {
-	fmt.Println(os.TempDir())
 	path = strings.Replace(p, "$metadata$", fmt.Sprintf("%s/csharp-metadata/", os.TempDir()), 1) //os.TempDir
 	return
 }
diff --git a/internal/lsp/acmelsp/proxy.go b/internal/lsp/acmelsp/proxy.go
index 9b95335..444cd17 100644
--- a/internal/lsp/acmelsp/proxy.go
+++ b/internal/lsp/acmelsp/proxy.go
@@ -18,6 +18,8 @@ type proxyServer struct {
 	fm *FileManager
 }
 
+var _ proxy.Server = (*proxyServer)(nil)
+
 func (s *proxyServer) Version(ctx context.Context) (int, error) {
 	return proxy.Version, nil
 }
diff --git a/internal/lsp/protocol/tsserver.go b/internal/lsp/protocol/tsserver.go
index af0dcc7..46438f6 100644
--- a/internal/lsp/protocol/tsserver.go
+++ b/internal/lsp/protocol/tsserver.go
@@ -9,7 +9,7 @@ import (
 	"github.com/fhs/acme-lsp/internal/golang_org_x_tools/xcontext"
 )
 
-type Server interface {
+type server interface {
 	DidChangeWorkspaceFolders(context.Context, *DidChangeWorkspaceFoldersParams) error
 	Initialized(context.Context, *InitializedParams) error
 	Exit(context.Context) error
@@ -53,9 +53,17 @@ type Server interface {
 	Rename(context.Context, *RenameParams) (*WorkspaceEdit, error)
 	PrepareRename(context.Context, *PrepareRenameParams) (*Range, error)
 	ExecuteCommand(context.Context, *ExecuteCommandParams) (interface{}, error)
+}
+
+type ExtendServer interface {
 	Metadata(context.Context, *MetadataParams) (*MetaSourceRsponse, error)
 }
 
+type Server interface {
+	server
+	ExtendServer
+}
+
 func (h serverHandler) Deliver(ctx context.Context, r *jsonrpc2.Request, delivered bool) bool {
 	if delivered {
 		return false
diff --git a/internal/lsp/proxy/server.go b/internal/lsp/proxy/server.go
index 8c8c109..4d83c73 100644
--- a/internal/lsp/proxy/server.go
+++ b/internal/lsp/proxy/server.go
@@ -15,7 +15,7 @@ const Version = 1
 
 // Server implements a subset of an LSP protocol server as defined by protocol.Server and
 // some custom acme-lsp specific methods.
-type Server interface {
+type subLspServer interface {
 	// Version returns the protocol version.
 	Version(context.Context) (int, error)
 
@@ -48,9 +48,17 @@ type Server interface {
 	SignatureHelp(context.Context, *protocol.SignatureHelpParams) (*protocol.SignatureHelp, error)
 	DocumentSymbol(context.Context, *protocol.DocumentSymbolParams) ([]protocol.DocumentSymbol, error)
 	TypeDefinition(context.Context, *protocol.TypeDefinitionParams) ([]protocol.Location, error)
+}
+
+type ExtendServer interface {
 	Metadata(context.Context, *protocol.MetadataParams) (*protocol.MetaSourceRsponse, error)
 }
 
+type Server interface {
+	subLspServer
+	ExtendServer
+}
+
 func (h serverHandler) Deliver(ctx context.Context, r *jsonrpc2.Request, delivered bool) bool {
 	if delivered {
 		return false