code: public PhysicalConnectionRequirements withSecurityGroupIdList(String... securityGroupIdList) {
          if (this.securityGroupIdList == null) {
              setSecurityGroupIdList(new java.util.ArrayList<String>(securityGroupIdList.length));
          }
          for (String ele : securityGroupIdList) {
              this.securityGroupIdList.add(ele);
          }
          return this;
      }
docs: <p>
  The security group ID list used by the connection.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSecurityGroupIdList(java.util.Collection)} or {@link #withSecurityGroupIdList(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param securityGroupIdList
  The security group ID list used by the connection.
  @return Returns a reference to this object so that method calls can be chained together.