RCS1085 suggests auto-property if backing field is used as in-parameter

[ovska]

Product and Version Used:
Roslynator.Analyzers 4.12.2

Steps to Reproduce:
Expose a backing field used as an in-parameter with a property.

Actual Behavior:

using System.Buffers;

class Repro(ReadOnlySequence<byte> data)
{                              // v RCS1085: use auto-implemented property
    public ReadOnlySequence<byte> Data => _data;
    private readonly ReadOnlySequence<byte> _data = data;

    public void Method(IBufferWriter<byte> writer)
    {
        Write1(in _data, writer);
        Write2(in _data, writer);
    }

    private static void Write1(in ReadOnlySequence<byte> data, IBufferWriter<byte> writer)
    {
        data.CopyTo(writer.GetSpan((int)data.Length));
    }

    private static void Write2(ref readonly ReadOnlySequence<byte> data, IBufferWriter<byte> writer)
    {
        data.CopyTo(writer.GetSpan((int)data.Length));
    }
}

Auto-fixer changes usages to Write1(in this.Data, writer), which correctly is then flagged as an error:

CS8156 An expression cannot be used in this context because it may not be passed or returned by reference

Expected Behavior:
No diagnostic should be reported.

As far as I know, there's no way of using a property return value with in without a backing field. This diagnostic seems to be reliant on _data being readonly, as removing the modifer silences RCS1085 (and then correctly raises IDE0044 Make field readonly). Making the backing field anything else than private also suppresses the warning.

I can try to take a crack at this with some direction. Does there exist a neat built-in way in Roslynator to find all usages of the field?