docs: private EsRequest fieldMapping( PropertyType type ) {
          EsRequest mappings = new EsRequest();
          switch (type) {
              case BINARY:
                  mappings.put("type", "binary");
                  break;
              case BOOLEAN:
                  mappings.put("type", "boolean");
                  break;
              case DATE:
                  mappings.put("type", "long");
                  break;
              case LONG:
              case DECIMAL:
                  mappings.put("type", "long");
                  break;
              case DOUBLE:
                  mappings.put("type", "double");
                  break;
              default:
                  mappings.put("type", "string");
                  mappings.put("analyzer", "whitespace");
          }
          return mappings;
      }