code: public Put withItem(java.util.Map<String, AttributeValue> item) {
          setItem(item);
          return this;
      }
docs: <p>
  A map of attribute name to attribute values, representing the primary key of the item to be written by
  <code>PutItem</code>. All of the table's primary key attributes must be specified, and their data types must
  match those of the table's key schema. If any attributes are present in the item that are part of an index key
  schema for the table, their types must match the index key schema.
  </p>
  
  @param item
  A map of attribute name to attribute values, representing the primary key of the item to be written by
  <code>PutItem</code>. All of the table's primary key attributes must be specified, and their data types
  must match those of the table's key schema. If any attributes are present in the item that are part of an
  index key schema for the table, their types must match the index key schema.
  @return Returns a reference to this object so that method calls can be chained together.