code: private void setJsonSchemaProperties(JsonObject jsonObject) {
      setColumnName(jsonObject.get(COLUMN_NAME_KEY).getAsString());
      setDataType(jsonObject.get(DATA_TYPE_KEY).getAsJsonObject());
      setNullable(jsonObject.has(IS_NULLABLE_KEY) && jsonObject.get(IS_NULLABLE_KEY).getAsBoolean());
      setComment(getOptionalProperty(jsonObject, COMMENT_KEY));
      setDefaultValue(getOptionalProperty(jsonObject, DEFAULT_VALUE_KEY));
    }
docs: Set properties for {@link JsonSchema} from a {@link JsonObject}.
  @param jsonObject