Method isExpandable

src/MacroExpander.ts:461–466

* Determine whether a command is expandable.

(name: string)

     * Determine whether a command is expandable.
     */
    isExpandable(name: string): boolean {
        const macro = this.macros.get(name);
        return macro != null ? typeof macro === "string"
                || typeof macro === "function" || !macro.unexpandable
            : functions.hasOwnProperty(name) && !functions[name].primitive;
    }
}