Function get_writer 

pub fn get_writer(format: &str) -> Option<OutputFormat>

Convenience factory that returns the OutputFormat variant for a given format string.

Accepted values (case-insensitive)

Input	Variant
"yaml"	OutputFormat::Yaml
"registry"	OutputFormat::Registry
"http_proxy" / "http-proxy" / "httpproxy"	OutputFormat::HttpProxy

Returns None for unrecognised strings.

Usage

use apcore_toolkit::output::get_writer;
use apcore_toolkit::output::OutputFormat;

let fmt = get_writer("yaml").unwrap();
assert_eq!(fmt, OutputFormat::Yaml);

// Then instantiate the concrete writer:
match fmt {
    OutputFormat::Yaml => { /* use YAMLWriter */ }
    OutputFormat::Registry => { /* use RegistryWriter */ }
    OutputFormat::HttpProxy => { /* use HTTPProxyRegistryWriter */ }
}