code: @GetMapping(value = "/{entityTypeId}/meta/{attributeName}", produces = APPLICATION_JSON_VALUE)
    public AttributeResponse retrieveEntityAttributeMeta(
        @PathVariable("entityTypeId") String entityTypeId,
        @PathVariable("attributeName") String attributeName,
        @RequestParam(value = "attributes", required = false) String[] attributes,
        @RequestParam(value = "expand", required = false) String[] attributeExpands) {
      Set<String> attributeSet = toAttributeSet(attributes);
      Map<String, Set<String>> attributeExpandSet = toExpandMap(attributeExpands);
  
      return getAttributePostInternal(entityTypeId, attributeName, attributeSet, attributeExpandSet);
    }
docs: Example url: /api/v1/person/meta/emailaddresses
  
  @return EntityType