Help me please. Fixed center marker Maps

Fixed center marker Maps, I have a problem that I can not solve. I am trying to create a marker to place fixedly on the screen. Like the line application. I use Google Maps native. I thank you if you find a solution.

The issue mentions a fixed center marker in Google Maps Native for an Ionic application but names no files, tests, or entry points. First clarify the intended marker behavior and provide a minimal reproduction; done should mean the marker remains fixed on screen while the map moves, matching the described use case.

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