a String containing the property key

when fetching a list specifies the permission level of all items in the list see {@link com.atlassian.jira.bc.admin.ApplicationPropertiesService.EditPermissionLevel}

when fetching a list allows the list to be filtered by the property's start of key e.g. "jira.lf.*" whould fetch only those permissions that are editable and whose keys start with "jira.lf.". This is a regex.