code: private static String dumpArrayString(Object[] arguments) {
      StringBuilder argBuf = new StringBuilder("[");
      for (int i = 0; i < arguments.length; i++) {
        if (i > 0) {
          argBuf.append(", ");
        }
        argBuf.append(DefaultGroovyMethods.dump(arguments[i]));
      }
      argBuf.append("]");
      return argBuf.toString();
    }
docs: /*
  Adapted from org.codehaus.groovy.runtime.InvokerHelper.toArrayString(java.lang.Object[]) to use dump()