code: public String getAttributeID(String name) {
      Map<String, String> m = this.getMapping();
      return m != null ? m.get(name) : null;
    }
docs: Returns the Shibboleth attribute ID that corresponds to the supplied SAML2 attribute name.
  
  @param name
  the attribute name
  @return the Shibboleth attribute ID or {@code null} if no mapping exists