cees@tim:~$ perl -MApache2 -MModPerl::MethodLookup -e print_method send_cgi_header
To use method 'send_cgi_header' add:
        use Apache::Response ();

##</code><code>##

tim:~# MOD_PERL=1 perl -MApache2 -MCGI -e '$,=$/;print sort keys %INC;'
APR/Pool.pm
APR/XSLoader.pm
Apache/RequestRec.pm
Apache/RequestUtil.pm
Apache/XSLoader.pm
Apache2.pm
...