Graphviz code: call nxdump.pal

._init
func/def	[main], &[.main]
local/rtn

.main
error/jmp	#0, &[.error]
% -----------------------------------------------------
func/call       NULL, [tools.gv_open], #2
% -----------------------------------------------------

func/call	NULL, [tools.nxdump], ![.prose]

% -----------------------------------------------------
func/call       NULL, [tools.gv_close]
% -----------------------------------------------------
func/rtn

.error
error/now
func/rtn