code: public ModifyDBInstanceRequest withVpcSecurityGroupIds(String... vpcSecurityGroupIds) {
          if (this.vpcSecurityGroupIds == null) {
              setVpcSecurityGroupIds(new java.util.ArrayList<String>(vpcSecurityGroupIds.length));
          }
          for (String ele : vpcSecurityGroupIds) {
              this.vpcSecurityGroupIds.add(ele);
          }
          return this;
      }
docs: <p>
  A list of EC2 VPC security groups to authorize on this DB instance. This change is asynchronously applied as soon
  as possible.
  </p>
  <p>
  Not applicable. The associated list of EC2 VPC security groups is managed by the DB cluster. For more
  information, see <a>ModifyDBCluster</a>.
  </p>
  <p>
  Constraints:
  </p>
  <ul>
  <li>
  <p>
  If supplied, must match existing VpcSecurityGroupIds.
  </p>
  </li>
  </ul>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setVpcSecurityGroupIds(java.util.Collection)} or {@link #withVpcSecurityGroupIds(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param vpcSecurityGroupIds
  A list of EC2 VPC security groups to authorize on this DB instance. This change is asynchronously applied
  as soon as possible.</p>
  <p>
  Not applicable. The associated list of EC2 VPC security groups is managed by the DB cluster. For more
  information, see <a>ModifyDBCluster</a>.
  </p>
  <p>
  Constraints:
  </p>
  <ul>
  <li>
  <p>
  If supplied, must match existing VpcSecurityGroupIds.
  </p>
  </li>
  @return Returns a reference to this object so that method calls can be chained together.