code: public Get withKey(java.util.Map<String, AttributeValue> key) {
          setKey(key);
          return this;
      }
docs: <p>
  A map of attribute names to <code>AttributeValue</code> objects that specifies the primary key of the item to
  retrieve.
  </p>
  
  @param key
  A map of attribute names to <code>AttributeValue</code> objects that specifies the primary key of the item
  to retrieve.
  @return Returns a reference to this object so that method calls can be chained together.