Type Alias TLanguageServerId

TLanguageServerId:
    | "pylsp"
    | "bash-language-server"
    | "dockerfile-language-server-nodejs"
    | "javascript-typescript-langserver"
    | "unified-language-server"
    | "vscode-css-languageserver-bin"
    | "vscode-html-languageserver-bin"
    | "vscode-json-languageserver-bin"
    | "yaml-language-server"
    | "r-languageserver"

Example server keys==ids that are expected. The list is not exhaustive. Custom server keys are allowed. Constraining the values helps avoid errors, but at runtime any value is allowed.