public java.util.List<String> getPolicyInputList() {
        if (policyInputList == null) {
            policyInputList = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return policyInputList;
    }
<p>
An optional list of additional policies for which you want the list of context keys that are referenced.
</p>
<p>
The <a href="http://wikipedia.org/wiki/regex">regex pattern</a> used to validate this parameter is a string of
characters consisting of the following:
</p>
<ul>
<li>
<p>
Any printable ASCII character ranging from the space character (<code>\u0020</code>) through the end of the ASCII
character range
</p>
</li>
<li>
<p>
The printable characters in the Basic Latin and Latin-1 Supplement character set (through <code>\u00FF</code>)
</p>
</li>
<li>
<p>
The special characters tab (<code>\u0009</code>), line feed (<code>\u000A</code>), and carriage return (<code>\u000D</code>
)
</p>
</li>
</ul>

@return An optional list of additional policies for which you want the list of context keys that are
        referenced.</p>
        <p>
        The <a href="http://wikipedia.org/wiki/regex">regex pattern</a> used to validate this parameter is a
        string of characters consisting of the following:
        </p>
        <ul>
        <li>
        <p>
        Any printable ASCII character ranging from the space character (<code>\u0020</code>) through the end of
        the ASCII character range
        </p>
        </li>
        <li>
        <p>
        The printable characters in the Basic Latin and Latin-1 Supplement character set (through
        <code>\u00FF</code>)
        </p>
        </li>
        <li>
        <p>
        The special characters tab (<code>\u0009</code>), line feed (<code>\u000A</code>), and carriage return (
        <code>\u000D</code>)
        </p>
        </li>
aws-java-sdk-iam/src/main/java/com/amazonaws/services/identitymanagement/model/GetContextKeysForPrincipalPolicyRequest.java