WINDOWS_EXTPATH_PREFIX

polars_utils::pl_path

Constant WINDOWS_EXTPATH_PREFIX 

Source 
pub const WINDOWS_EXTPATH_PREFIX: &str = r#"\\?\"#;
Expand description

Windows paths can be prefixed with this. https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=registry