# File lib/dbi/handles.rb, line 21
21:         def trace(mode=nil, output=nil)
22:             # FIXME trace
23:             raise InterfaceError, "the trace module has been removed until it actually works."
24:             @trace_mode   = mode   || @trace_mode   || DBI::DEFAULT_TRACE_MODE
25:             @trace_output = output || @trace_output || DBI::DEFAULT_TRACE_OUTPUT
26:         end