pub fn read_get<T: AsRef<str>>(&mut self, query: T) -> Result<Option<String>> {
        self.read()?;

        Ok(self.get(query))
    }
/// Read the system config and get a value for a key.
Read the system config and get a value for a key.
Read the system config and get a value for a key .
pub fn read_get<T: AsRef<str>>(&mut self, query: T) -> Result<Option<String>> {
        self.read()?;
        Ok(self.get(query))
    }
pub fn read_get < T : AsRef < str > > ( & mut self , query : T ) -> Result < Option < String > > { self . read ( ) ? ; Ok ( self . get ( query ) ) }
Read the system config and get a value for a key.
Read the system config and get a value for a key .
&mut self
query
T