# File lib/rspec/core.rb, line 80
  def self.configuration
    if block_given?
      RSpec.warn_deprecation "\n*****************************************************************\nDEPRECATION WARNING\n\n* RSpec.configuration with a block is deprecated and has no effect.\n* please use RSpec.configure with a block instead.\n\nCalled from \#{caller(0)[1]}\n*****************************************************************\n\n"
    end
    @configuration ||= RSpec::Core::Configuration.new
  end