mod language_servers; use zed_extension_api::{self as zed, Result}; use crate::language_servers::{ErlangLanguagePlatform, ErlangLs}; struct ErlangExtension {    erlang_ls: Option<ErlangLs>,    erlang_language_platform: Option<ErlangLanguagePlatform>,} impl zed::Extension for ErlangExtension {    fn new() -> Self {        Self {            erlang_ls: None,            erlang_language_platform: None,        }    }     fn language_server_command(        &mut self,        language_server_id: &zed::LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<zed::Command> {        match language_server_id.as_ref() {            ErlangLs::LANGUAGE_SERVER_ID => {                let erlang_ls = self.erlang_ls.get_or_insert_with(ErlangLs::new);                 Ok(zed::Command {                    command: erlang_ls.language_server_binary_path(language_server_id, worktree)?,                    args: vec![],                    env: Default::default(),                })            }            ErlangLanguagePlatform::LANGUAGE_SERVER_ID => {                let erlang_language_platform = self                    .erlang_language_platform                    .get_or_insert_with(ErlangLanguagePlatform::new);                erlang_language_platform.language_server_command(language_server_id, worktree)            }            language_server_id => Err(format!("unknown language server: {language_server_id}")),        }    }} zed::register_extension!(ErlangExtension);