pub fn is_integer(&self) -> bool {
        match *self {
            Value::Integer(_) => true,
            _ => false,
        }
    }
/// `is_integer` returns true if the value is an integer.
`is_integer` returns true if the value is an integer.
` is_integer ` returns true if the value is an integer .
pub fn is_integer(&self) -> bool {
        match *self {
            Value::Integer(_) => true,
            _ => false,
        }
    }
pub fn is_integer ( & self ) -> bool { match * self { Value :: Integer ( _ ) => true , _ => false , } }
`is_integer` returns true if the value is an integer.
` is_integer ` returns true if the value is an integer .
&self