public static SchemaSpecification load(String string) {
    return YAML.load(string, SchemaSpecification.class);
  }
A model of example input source features and expected output vector tile features that a schema should produce.
<p>
Executed by a subclass of {@link BaseSchemaValidator}.
planetiler-core/src/main/java/com/onthegomap/planetiler/validator/SchemaSpecification.java