else if std.startsWith(labels[k], "!") then
            '%s!="%s"'%[ k, std.lstripChars(labels[k], '!')]
          else 
            '%s="%s"' %[k, labels[k]]
          ,
        std.objectFields(labels)
      ));
      "%s{%s}"%[metric_name, prom_labels],

import java.util.Map;

import org.codelibs.core.exception.ClIllegalArgumentException;
import org.junit.Test;

/**
 * @author y-komori
 *
 */
public class FieldUtilTest {

    /** */
    public Object objectField;

    /** */
    public int intField;

    /** */
    public String stringField;

    /** */
    public static final int INT_DATA = 987654321;

    /** */