code: public AttributeValue withL(AttributeValue... l) {
          if (this.l == null) {
              setL(new java.util.ArrayList<AttributeValue>(l.length));
          }
          for (AttributeValue ele : l) {
              this.l.add(ele);
          }
          return this;
      }
docs: <p>
  An attribute of type List. For example:
  </p>
  <p>
  <code>"L": [ {"S": "Cookies"} , {"S": "Coffee"}, {"N", "3.14159"}]</code>
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setL(java.util.Collection)} or {@link #withL(java.util.Collection)} if you want to override the existing
  values.
  </p>
  
  @param l
  An attribute of type List. For example:</p>
  <p>
  <code>"L": [ {"S": "Cookies"} , {"S": "Coffee"}, {"N", "3.14159"}]</code>
  @return Returns a reference to this object so that method calls can be chained together.