def top_level_file(absolute_path=true)
     
      path = get_property(TopLevelFileProperty)

      #If the absolute_path flag is set, and we know how, expand the file path.
      if absolute_path
        path = File.expand_path(path, @base_path) 
      end

      #Return the relevant path.
      path

    end
def top_level_file(absolute_path=true)
     
      path = get_property(TopLevelFileProperty)

      #If the absolute_path flag is set, and we know how, expand the file path.
      if absolute_path
        path = File.expand_path(path, @base_path) 
      end

      #Return the relevant path.
      path

    end
Returns a path to the top-level file in the given project.

 absoulute_path: If set when the project file's path is known, an absolute path will be returned.