[x] Appropriate branch selected (all PRs must first be merged to dev before they can be merged to master)
[x] Any modified or new methods or classes have helpful JavaDoc and code is thoroughly commented
[x] The description lists all applicable issues this PR seeks to resolve
[x] The description lists any configuration setting(s) that differ from the default settings
[x] All tests and CI builds passing
Description
This PR covers loading, exporting and validating multiple location groups. Multi location groups are defined as two or more location groups with the same id. These location groups on loading are combined into a single record/row with an array of location id values. On export, the reverse takes place expanding multi location groups in to single rows to conform with the GTFS Flex spec. A special case has been added to validate references where more than one location id has been defined i.e. it loops over all location ids and checks references for each.
Checklist
devbefore they can be merged tomaster)Description
This PR covers loading, exporting and validating multiple location groups. Multi location groups are defined as two or more location groups with the same id. These location groups on loading are combined into a single record/row with an array of location id values. On export, the reverse takes place expanding multi location groups in to single rows to conform with the GTFS Flex spec. A special case has been added to validate references where more than one location id has been defined i.e. it loops over all location ids and checks references for each.