code: public java.util.List<String> getContextKeyNames() {
          if (contextKeyNames == null) {
              contextKeyNames = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return contextKeyNames;
      }
docs: <p>
  The list of context keys that are referenced in the input policies.
  </p>
  
  @return The list of context keys that are referenced in the input policies.