code: public DescribeNetworkInterfacePermissionsResult withNetworkInterfacePermissions(NetworkInterfacePermission... networkInterfacePermissions) {
          if (this.networkInterfacePermissions == null) {
              setNetworkInterfacePermissions(new com.amazonaws.internal.SdkInternalList<NetworkInterfacePermission>(networkInterfacePermissions.length));
          }
          for (NetworkInterfacePermission ele : networkInterfacePermissions) {
              this.networkInterfacePermissions.add(ele);
          }
          return this;
      }
docs: <p>
  The network interface permissions.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setNetworkInterfacePermissions(java.util.Collection)} or
  {@link #withNetworkInterfacePermissions(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param networkInterfacePermissions
  The network interface permissions.
  @return Returns a reference to this object so that method calls can be chained together.