if (allowableNamespaces != null) {
for (int ix = 0; ix < allowableNamespaces.size(); ix++) {
final String namespace = allowableNamespaces.get(ix).toString();
try {
this.getExtensionAllowables().add(new ExtensionAllowed(namespace));
logger.info("Graph [" + graphName + "] - configured with allowable namespace [" + namespace + "]");
} catch (IllegalArgumentException iae) {
logger.warn("Graph [" + graphName + "] - Extension defined with an invalid namespace: " + namespace
+ ". It will not be configured.");