code: public java.util.List<String> getDefaultSecurityGroupNames() {
          if (defaultSecurityGroupNames == null) {
              defaultSecurityGroupNames = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return defaultSecurityGroupNames;
      }
docs: <p>
  An array containing the layer's security group names.
  </p>
  
  @return An array containing the layer's security group names.