# File lib/method_source.rb, line 23
  def self.source_helper(source_location, name=nil)
    raise SourceNotFoundError, "Could not locate source for #{name}!" unless source_location
    file, line = *source_location

    expression_at(lines_for(file), line)
  rescue SyntaxError => e
    raise SourceNotFoundError, "Could not parse source for #{name}: #{e.message}"
  end