modules/jooby-apitool/src/main/java/org/jooby/apitool/raml/Raml.java
public String toYaml() throws IOException {
    YAMLMapper mapper = new YAMLMapper();
    mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    mapper.configure(YAMLGenerator.Feature.ALWAYS_QUOTE_NUMBERS_AS_STRINGS, false);
    mapper.configure(YAMLGenerator.Feature.MINIMIZE_QUOTES, true);
    return "#%RAML 1.0\n" + mapper.writer().withDefaultPrettyPrinter().writeValueAsString(this);
  }
public String toYaml() throws IOException {
    YAMLMapper mapper = new YAMLMapper();
    mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
    mapper.configure(YAMLGenerator.Feature.ALWAYS_QUOTE_NUMBERS_AS_STRINGS, false);
    mapper.configure(YAMLGenerator.Feature.MINIMIZE_QUOTES, true);
    return "#%RAML 1.0\n" + mapper.writer().withDefaultPrettyPrinter().writeValueAsString(this);
  }
Convert this RAML object to Yaml.

@return Yaml string.
@throws IOException If something goes wrong.