class RSpec::Mocks::ErrorGenerator

def __raise(message, backtrace_line=nil, source_id=nil)

def __raise(message, backtrace_line=nil, source_id=nil)
  message = opts[:message] unless opts[:message].nil?
  exception = RSpec::Mocks::MockExpectationError.new(message)
  prepend_to_backtrace(exception, backtrace_line) if backtrace_line
  notify exception, :source_id => source_id
end