change hard-coded references to the type (`gEdge` in this case) to use `this.GetType().ToString()` in all occurrences of this pattern

[SHKnudsen]

change hard-coded references to the type (gEdge in this case) to use this.GetType().ToString() in all occurrences of this pattern

_Originally posted by @radumg in https://github.com/render_node/MDE3OlB1bGxSZXF1ZXN0UmV2aWV3MjE5MzAyODgy/pull_request_reviews/more_threads

[radumg]

better yet, use compile-time constant nameof(gEdge)