During configuration of a flow, as the amount of DSL code to execute in a flow grows, a 4k limit for GET requests as imposed by Apache can be exceeded, resulting in the message

Request Entity Too Large
The requested resource
/jenkins/view/trunk/job/=flow_trunk/descriptorByName/com.cloudbees.plugins.flow.BuildFlow/checkDsl
does not allow request data with GET requests, or the amount of data provided in the request exceeds the capacity limit.
Apache/2.2.22 (Debian) Server at xxxxxx-ci.xxxxxx.ch Port pppp

right after the "Define build flow using flow DSL" text entry field.

The message is sometimes visible as copied above, at other times only an "ERROR" link is displayed which gets expanded to the message when clicked.

Could HTTP POST requests be used instead of HTTP GET requests?