code: static TableSchema createTableSchemaFromFields(String fieldsJson) throws IOException {
      List<TableFieldSchema> fields = new ArrayList<>();
      JsonParser parser = JacksonFactory.getDefaultInstance().createJsonParser(fieldsJson);
      parser.parseArrayAndClose(fields, TableFieldSchema.class);
  
      return new TableSchema().setFields(fields);
    }
docs: Creates {@link TableSchema} from the JSON representation of the table fields.
  
  @param fieldsJson JSON fields to convert to {@link TableSchema}
  @return {@link TableSchema}
  @throws IOException