docs: function Importer(opts) {
    var self = this;
    opts = opts || {};
    EventEmitter.call(this);
    this.cwd = opts.cwd ? path.resolve(opts.cwd) : process.cwd();
    this.file = opts.file ? path.resolve(opts.cwd, opts.file) : this.cwd;
    this.data = opts.data;
    this.includePaths = opts.includePaths || [];
  
    // Map all include paths to configured working directory:
    this.includePaths = this.includePaths.map(function(includePath) {
      return path.resolve(self.cwd, includePath);
    });
  }