code: public Object getParameter(String paramid) {
          final Object v = get(PARAM_PREFIX + paramid);
          if (v == null) {
              return null;
          } else {
              if (v instanceof String[]) {
                  String[] s = (String[]) v;
                  if (s.length == 1) {
                      return s[0];
                  } else {
                      return s;
                  }
              }
              return v;
          }
      }
docs: Look for a parameter in the context with the given name.
  
  @param paramid parameter id
  @return parameter value