presto-example-http/src/main/java/io/prestosql/plugin/example/ExampleColumn.java/ExampleColumn/ExampleColumn
class ExampleColumn:    @JsonCreator
    public ExampleColumn(
            @JsonProperty("name") String name,
            @JsonProperty("type") Type type)
    {
        checkArgument(!isNullOrEmpty(name), "name is null or is empty");
        this.name = name;
        this.type = requireNonNull(type, "type is null");
    }