pub fn from_env(env: &str) -> Builder {
        let mut builder = Builder::new();

        if let Ok(s) = env::var(env) {
            builder.parse(&s);
        }

        builder
    }
/// Initializes the filter builder from an environment.
Initializes the filter builder from an environment.
Initializes the filter builder from an environment .
pub fn from_env(env: &str) -> Builder {
        let mut builder = Builder::new();
        if let Ok(s) = env::var(env) {
            builder.parse(&s);
        }
        builder
    }
pub fn from_env ( env : & str ) -> Builder { let mut builder = Builder :: new ( ) ; if let Ok ( s ) = env :: var ( env ) { builder . parse ( & s ) ; } builder }
Initializes the filter builder from an environment.
Initializes the filter builder from an environment .
env
&str
env
&str