Returns all set (non-empty) custom field values. It can be filtered by

• type - returns all custom fields values of given types. Multiple types can be specified.
• hierarchyEntity.id - returns all custom fields values for the hierarchy entity (row).
• customField.id - returns all custom fields values for the custom field (column).

The filters can be combined. Either customField.id or type has to be specified to not break existing API consumers when adding a new custom field type.

This API is paginated, only the first 100 items are returned by default. The client should then recursively follow links.next link in the response to fetch the next page.