public java.util.Map<String, java.util.List<WriteRequest>> getRequestItems() {
        return requestItems;
    }
<p>
A map of one or more table names or table ARNs and, for each table, a list of operations to be performed (
<code>DeleteRequest</code> or <code>PutRequest</code>). Each element in the map consists of the following:
</p>
<ul>
<li>
<p>
<code>DeleteRequest</code> - Perform a <code>DeleteItem</code> operation on the specified item. The item to be
deleted is identified by a <code>Key</code> subelement:
</p>
<ul>
<li>
<p>
<code>Key</code> - A map of primary key attribute values that uniquely identify the item. Each entry in this map
consists of an attribute name and an attribute value. For each primary key, you must provide <i>all</i> of the
key attributes. For example, with a simple primary key, you only need to provide a value for the partition key.
For a composite primary key, you must provide values for <i>both</i> the partition key and the sort key.
</p>
</li>
</ul>
</li>
<li>
<p>
<code>PutRequest</code> - Perform a <code>PutItem</code> operation on the specified item. The item to be put is
identified by an <code>Item</code> subelement:
</p>
<ul>
<li>
<p>
<code>Item</code> - A map of attributes and their values. Each entry in this map consists of an attribute name
and an attribute value. Attribute values must not be null; string and binary type attributes must have lengths
greater than zero; and set type attributes must not be empty. Requests that contain empty values are rejected
with a <code>ValidationException</code> exception.
</p>
<p>
If you specify any attributes that are part of an index key, then the data types for those attributes must match
those of the schema in the table's attribute definition.
</p>
</li>
</ul>
</li>
</ul>

@return A map of one or more table names or table ARNs and, for each table, a list of operations to be performed
        (<code>DeleteRequest</code> or <code>PutRequest</code>). Each element in the map consists of the
        following:</p>
        <ul>
        <li>
        <p>
        <code>DeleteRequest</code> - Perform a <code>DeleteItem</code> operation on the specified item. The item
        to be deleted is identified by a <code>Key</code> subelement:
        </p>
        <ul>
        <li>
        <p>
        <code>Key</code> - A map of primary key attribute values that uniquely identify the item. Each entry in
        this map consists of an attribute name and an attribute value. For each primary key, you must provide
        <i>all</i> of the key attributes. For example, with a simple primary key, you only need to provide a
        value for the partition key. For a composite primary key, you must provide values for <i>both</i> the
        partition key and the sort key.
        </p>
        </li>
        </ul>
        </li>
        <li>
        <p>
        <code>PutRequest</code> - Perform a <code>PutItem</code> operation on the specified item. The item to be
        put is identified by an <code>Item</code> subelement:
        </p>
        <ul>
        <li>
        <p>
        <code>Item</code> - A map of attributes and their values. Each entry in this map consists of an attribute
        name and an attribute value. Attribute values must not be null; string and binary type attributes must
        have lengths greater than zero; and set type attributes must not be empty. Requests that contain empty
        values are rejected with a <code>ValidationException</code> exception.
        </p>
        <p>
        If you specify any attributes that are part of an index key, then the data types for those attributes
        must match those of the schema in the table's attribute definition.
        </p>
        </li>
        </ul>
        </li>
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/model/BatchWriteItemRequest.java