public MultiPolygonPath<MultiPolygon> asMultiPolygon() {
        if (multiPolygon == null) {
            multiPolygon = new MultiPolygonPath<MultiPolygon>(pathMixin.getMetadata());
        }
        return multiPolygon;
    }
{@code GeometryPath} extends {@link GeometryExpression} to implement the
{@link Path} interface

@author tiwe

@param <T>
querydsl-spatial/src/main/java/com/querydsl/spatial/GeometryPath.java