fn available_value(&self) -> Result<(), Error> {
        if self.is_value_unavailable() {
            Err(Error::UnavailableInformation)
        } else {
            Ok(())
        }
    }
/// Check if the value contained by this attribute is invalid or unavailable in a faillible way.
/// Same as `valid_value`.
Check if the value contained by this attribute is invalid or unavailable in a faillible way.
Check if the value contained by this attribute is invalid or unavailable in a faillible way .
fn available_value(&self) -> Result<(), Error> {
        if self.is_value_unavailable() {
            Err(Error::UnavailableInformation)
        } else {
            Ok(())
        }
    }
fn available_value ( & self ) -> Result < ( ) , Error > { if self . is_value_unavailable ( ) { Err ( Error :: UnavailableInformation ) } else { Ok ( ( ) ) } }
Check if the value contained by this attribute is invalid or unavailable in a faillible way.
Check if the value contained by this attribute is invalid or unavailable in a faillible way .
&self
&self