public static com.google.api.expr.v1alpha1.Type fieldType(String fieldName) {
    var field = FIELDS.get(fieldName);
    return field == null ? null : field.type;
  }
Wrapper for a geometry that exposes utility functions to CEL expressions.
planetiler-custommap/src/main/java/com/onthegomap/planetiler/custommap/expression/stdlib/GeometryVal.java