code: public ListRootsResult withRoots(Root... roots) {
          if (this.roots == null) {
              setRoots(new java.util.ArrayList<Root>(roots.length));
          }
          for (Root ele : roots) {
              this.roots.add(ele);
          }
          return this;
      }
docs: <p>
  A list of roots that are defined in an organization.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setRoots(java.util.Collection)} or {@link #withRoots(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param roots
  A list of roots that are defined in an organization.
  @return Returns a reference to this object so that method calls can be chained together.