code: public void setCustomProperties(Properties customProperties) {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.entry(tc, "setCustomProperties", customProperties);
  
          this.customProperties = customProperties;
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.exit(tc, "setCustomProperties");
      }
docs: Method called by WebSphere Application Server runtime to set the custom
  properties configured for the custom KeyManager.
  
  @param customProperties
  - contains the custom properties configured.