@Override
                public <R, C> R accept(Visitor<R, C> v, C context) {
                    return this.mixin.accept(v, context);
                }
Create a new GeometryExpression

@param expr Expression of type Geometry
@return new GeometryExpression
querydsl-spatial/src/main/java/com/querydsl/spatial/GeometryExpressions.java