code: public ListChildrenResult withChildren(Child... children) {
          if (this.children == null) {
              setChildren(new java.util.ArrayList<Child>(children.length));
          }
          for (Child ele : children) {
              this.children.add(ele);
          }
          return this;
      }
docs: <p>
  The list of children of the specified parent container.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setChildren(java.util.Collection)} or {@link #withChildren(java.util.Collection)} if you want to override
  the existing values.
  </p>
  
  @param children
  The list of children of the specified parent container.
  @return Returns a reference to this object so that method calls can be chained together.