For sane, modern languages like C# and Java, autocomplete has worked somewhere between adequate and amazingly well for a long time already. I think it used to

For sane, modern languages like C# and Java, autocomplete has worked somewhere between adequate and amazingly well for a long time already. I think it used to be kind of usable also in VB6 also, at least that is how I remember it. Golang and Typescript seems to have good support too now. But for just the thing you mention above you could go a long way with live templates or what it is called in different IDEs, or just text templates with variables like the Rails guys used to use in their demos.