The javadocs for ColumnVisibility have incorrect information
- The top level java doc refers to the ColumnVisibility(byte) constructor for details on valid expressions, even though that information move to the ColumnVisibility(String) construtor
- The docs incorrectly state that valid labels are [a-zA-Z0-9_-]+
Finally, the section of the user manual on visibility expressions should really cover this as well. At the moment it is silent on validity of labels.