public Circle withCenter(Double... center) {
        if (this.center == null) {
            setCenter(new java.util.ArrayList<Double>(center.length));
        }
        for (Double ele : center) {
            this.center.add(ele);
        }
        return this;
    }
<p>
A single point geometry, specifying the center of the circle, using <a
href="https://gisgeography.com/wgs84-world-geodetic-system/">WGS 84</a> coordinates, in the form
<code>[longitude, latitude]</code>.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setCenter(java.util.Collection)} or {@link #withCenter(java.util.Collection)} if you want to override the
existing values.
</p>

@param center
       A single point geometry, specifying the center of the circle, using <a
       href="https://gisgeography.com/wgs84-world-geodetic-system/">WGS 84</a> coordinates, in the form
       <code>[longitude, latitude]</code>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-location/src/main/java/com/amazonaws/services/location/model/Circle.java