You do not edit that file. it needs to be copied. See for some guidance:
https://cwiki.apache.org/confluence/display/NETBEANS/Font+Rendering+Issues On 1/24/20 5:48 AM, Patrik Karlström wrote:
How do I edit netbeans.conf on a snap install? /var/lib/snapd/snap/netbeans-dev/45/netbeans/etc/netbeans.conf resides on a write protected file system.
