You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dataset.rb
    path of file: ./repos/rom/lib/rom/components
    
    the code of the file until where you have to start completion: # frozen_string_
    
      def build
        if gateway?
          blocks.reduce(gateway.dataset(id)) { |ds, blk| evaluate_block(ds, blk) }
        elsif block
          schema ? block.(schema) : block.()
        else
          EMPTY_ARRAY
        end