public static ScriptEnvironment<FeatureAttribute> description(Root root) {
      return FeaturePostMatch.description(root)
        .forInput(FeatureAttribute.class)
        .withDeclarations(Decls.newVar(VALUE, Decls.Any));
    }
Context available when configuring an attribute on an output feature after its value has been assigned (for example
setting min/max zoom).

@param parent The parent context
@param value  Value of the attribute
planetiler-custommap/src/main/java/com/onthegomap/planetiler/custommap/Contexts.java