Don't assume VSCode internal commands in the server

editors/code/src/commands.ts

@@ -87,6 +87,12 @@ export function shuffleCrateGraph(ctx: CtxInit): Cmd {
     };
 }
 
+export function triggerParameterHints(_: CtxInit): Cmd {
+    return async () => {
+        await vscode.commands.executeCommand("editor.action.triggerParameterHints");
+    };
+}
+
 export function matchingBrace(ctx: CtxInit): Cmd {
     return async () => {
         const editor = ctx.activeRustEditor;

editors/code/src/main.ts

@@ -186,5 +186,6 @@ function createCommands(): Record<string, CommandFactory> {
         resolveCodeAction: { enabled: commands.resolveCodeAction },
         runSingle: { enabled: commands.runSingle },
         showReferences: { enabled: commands.showReferences },
+        triggerParameterHints: { enabled: commands.triggerParameterHints },
     };
 }