http://rubygems.org/gems/sender Adds __sender__ and __caller__ to the built-in __callee__ and __method__ functions. Adds object-oriented backtrace, which returns :object and :method for each stack frame, and which permits queries regarding backtrace contents. * __sender__ * __caller__ * backtrace * backtrace( frames_to_trace_backward ) * backtrace_includes?( Class ) * backtrace_includes?( class_instance ) * backtrace_includes?( :symbol ) * backtrace_includes?( Class, class_instance, :symbol, ... )