pub fn get_value_display<'a, F>(
array: &'a (dyn Array + 'static),
null: &'static str
) -> Box<dyn Fn(&mut F, usize) -> Result<(), Error> + 'a>where
F: Write + 'a,Expand description
Returns a function that writes the value of the element of array
at position index to a Write,
writing null in the null slots.