Issue with matching a map

[tienvx]

I can't match a map in protobuf. Here is the protobuf file:

syntax = "proto3";

package library;

message Person {
  string id = 1;
  Name name = 2;
  map<string, int32> children = 3;
}

message Name {
  string given = 1;
  string surname = 2;
}

Here is the message content:

{
  "pact:proto": "/home/tien/Projects/pact/pact-php/example/protobuf-async-message/consumer/tests/MessageHandler/../../../library/proto/say_hello.proto",
  "pact:message-type": "Person",
  "pact:content-type": "application/protobuf",
  "id": "matching(regex, '^[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12}$', 'd1f077b5-0f91-40aa-b8f9-568b50ee4dd9')",
  "name": {
    "given": "matching(type, 'Given')",
    "surname": "matching(type, 'Surname')"
  },
  "children": "eachKey(matching(type, 'some string')), eachValue(matching(number, 23)), atLeast(0), atMost(3)"
}

Here is the log:

2024-05-12T06:46:11.193163Z ERROR ThreadId(01) pact_ffi::plugins: Failed to call out to plugin - Request to configure interaction failed: Failed to process protobuf: Map fields need to be configured with a Map, got String("eachKey(matching(type, 'some string')), eachValue(matching(number, 23)), atLeast(0), atMost(3)")

Here is the code https://github.com/pact-foundation/pact-php/pull/602/files

FFI Version: 0.4.19

What did I do wrong? What can I do instead?