code: public Layer withDefaultSecurityGroupNames(String... defaultSecurityGroupNames) {
          if (this.defaultSecurityGroupNames == null) {
              setDefaultSecurityGroupNames(new com.amazonaws.internal.SdkInternalList<String>(defaultSecurityGroupNames.length));
          }
          for (String ele : defaultSecurityGroupNames) {
              this.defaultSecurityGroupNames.add(ele);
          }
          return this;
      }
docs: <p>
  An array containing the layer's security group names.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDefaultSecurityGroupNames(java.util.Collection)} or
  {@link #withDefaultSecurityGroupNames(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param defaultSecurityGroupNames
  An array containing the layer's security group names.
  @return Returns a reference to this object so that method calls can be chained together.