code: public java.util.List<VpcSecurityGroupMembership> getVpcSecurityGroups() {
          if (vpcSecurityGroups == null) {
              vpcSecurityGroups = new com.amazonaws.internal.SdkInternalList<VpcSecurityGroupMembership>();
          }
          return vpcSecurityGroups;
      }
docs: <p>
  Provides a list of VPC security groups that the DB cluster belongs to.
  </p>
  
  @return Provides a list of VPC security groups that the DB cluster belongs to.