docs: public Map<String, OrgInfo> getPeerOrgInfos(final String peerName) throws InvalidArgumentException {
          if (Utils.isNullOrEmpty(peerName)) {
              throw new InvalidArgumentException("peerName can not be null or empty.");
          }
  
          if (organizations == null || organizations.isEmpty()) {
              return new HashMap<>();
          }
  
          Map<String, OrgInfo> ret = new HashMap<>(16);
          organizations.forEach((name, orgInfo) -> {
  
              if (orgInfo.getPeerNames().contains(peerName)) {
                  ret.put(name, orgInfo);
              }
          });
  
          return ret;
      }