public boolean shouldInclude(Map<String, Object> context) {
    return (this.when == null) || this.when.evaluate(context);
  }
Processes the expression indicating when this {@link KerberosIdentityDescriptor} is to be included
in the set of Kerberos identities to process.
<p>
<code>True</code> will be returned if the expression is <code>null</code> or if it evaluates
as such.

@param context A Map of context values, including at least the list of services and available configurations
@return true if this {@link KerberosIdentityDescriptor} is to be included when processing the
Kerberos identities; otherwise false.
ambari-server/src/main/java/org/apache/ambari/server/state/kerberos/KerberosIdentityDescriptor.java