If you run
|$ ccm get --all

you might expect to see a list of all configurable parameters.

The current situation is that "ccm get --all" does not get all.
For example,

|$ ccm get --all | grep -c transformer
|0
|$ find core/src/ -name \*.java | xargs grep "waf." | grep transformer
|core/src/com/arsdigita/util/xml/XMLConfig.java:            ("waf.xml.xsl_transformer",


So, if I want to sent the "waf.xml.xsl_transformer" parameter, and the
only thing I vaguely remember about it that it part of its name is the
substring "transformer", I won't find it listed among available
parameters by doing "ccm get --all".  Not only that, but also

|$ ccm get waf.xml.xsl_transformer

produces not output, instead of saying something like
"waf.xml.xsl_transformer is not set".