public String getUnitNumber() {
        return this.unitNumber;
    }
<p>
For addresses with multiple units, the unit identifier. Can include numbers and letters, for example
<code>3B</code> or <code>Unit 123</code>.
</p>
<note>
<p>
Returned only for a place index that uses Esri or Grab as a data provider. Is not returned for
<code>SearchPlaceIndexForPosition</code>.
</p>
</note>

@return For addresses with multiple units, the unit identifier. Can include numbers and letters, for example
        <code>3B</code> or <code>Unit 123</code>.</p> <note>
        <p>
        Returned only for a place index that uses Esri or Grab as a data provider. Is not returned for
        <code>SearchPlaceIndexForPosition</code>.
        </p>
aws-java-sdk-location/src/main/java/com/amazonaws/services/location/model/Place.java