Extended by: DSL Included in: DSL::Matcher Defined in: lib/rspec/matchers.rb, lib/rspec/matchers/dsl.rb, lib/rspec/matchers/built_in.rb, lib/rspec/matchers/composable.rb, lib/rspec/matchers/built_in/be.rb, lib/rspec/matchers/built_in/eq.rb, lib/rspec/matchers/built_in/all.rb, lib/rspec/matchers/built_in/eql.rb, lib/rspec/matchers/built_in/has.rb, lib/rspec/matchers/fail_matchers.rb, lib/rspec/matc