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# Description #11492 fixed flags for builtin commands but I missed that plugins don't use the same `has_flag` that builtins do. This PR addresses this. Unfortunately this means that return value of `has_flag` needs to change from `bool` to `Result<bool, ShellError>` to produce an error when explicit value is not a boolean (just like in case of `has_flag` for builtin commands. It is not possible to check this in `EvaluatedCall::try_from_call` because # User-Facing Changes Passing explicit values to flags of plugin commands (like `--flag=true` `--flag=false`) should work now. BREAKING: changed return value of `EvaluatedCall::has_flag` method from `bool` to `Result<bool, ShellError>` # Tests + Formatting Added tests and updated documentation and examples