public String[] ex_q;

    public String sdh;

    @Override
    public String getQuery() {
        return q;
    }

    @Override
    public String[] getExtraQueries() {
        return stream(ex_q).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
    }

    @Override
    public Map<String, String[]> getFields() {
        return fields;
    }

  // TODO: search for toLowerCase and consider moving logic here.
  constructor(name: String, value: String) : this(name.encodeUtf8(), value.encodeUtf8())

  constructor(name: ByteString, value: String) : this(name, value.encodeUtf8())

  override fun toString(): String = "${name.utf8()}: ${value.utf8()}"

  companion object {
    // Special header names defined in HTTP/2 spec.

	type args struct {
		yamlStr string
	}
	type PrefixTemp struct {
		Prefix BatchJobPrefix `yaml:"prefix"`
	}
	tests := []struct {
		name    string
		b       PrefixTemp
		args    args
		want    []string
		wantErr bool
	}{
		{
			name: "test1",
			b:    PrefixTemp{},
			args: args{
				yamlStr: `
prefix: "foo"
`,
			},
			want:    []string{"foo"},
			wantErr: false,
		},
		{

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
            }
        },

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
            }
        },

    private final Map<String, ClassDoc> extensionClasses = [:]
    private final String pluginId
    final ClassDoc targetClass
    final List<PropertyDoc> extraProperties = []
    final List<BlockDoc> extraBlocks = []

    ClassExtensionDoc(String pluginId, ClassDoc targetClass) {
        this.pluginId = pluginId
        this.targetClass = targetClass
    }

    String getPluginId() {
        return pluginId

        return getInetAddress();
    }


    /**
     * Returns this IP adress as a {@link java.lang.String} in the form "%d.%d.%d.%d".
     * 
     * @return string representation of the IP address
     */

    @Override
    public String getHostAddress () {

    Type t = aTypeVariable();
    assertEquals(String.class, new TypeResolver().where(t, String.class).resolveType(t));
  }

  public <T> void testWhere_indirectMapping() {
    Type t1 = new TypeCapture<T>() {}.capture();
    Type t2 = aTypeVariable();
    assertEquals(
        String.class, new TypeResolver().where(t1, t2).where(t2, String.class).resolveType(t1));
  }

    protected Map<String, String> fieldRuleMap = new LinkedHashMap<>();

    /** a flag to trim a space characters. */
    protected boolean trimSpaceEnabled = true;

    protected String charsetName = Constants.UTF_8;

    /**
     * Class type returned by getData() method. The default is null(XML content
     * of String).
     */
    protected Class<?> dataClass = null;

		}
	}
}

// NamedExpr raw expression for named expr
type NamedExpr struct {
	SQL  string
	Vars []interface{}
}

// Build build raw expression
func (expr NamedExpr) Build(builder Builder) {
	var (
		idx              int
		inName           bool
		afterParenthesis bool
		namedMap         = make(map[string]interface{}, len(expr.Vars))
	)

	for _, v := range expr.Vars {
		switch value := v.(type) {