Function popup_set_header 

pub unsafe extern "C" fn popup_set_header(
    popup: *mut Popup,
    text: *const c_char,
    x: u8,
    y: u8,
    horizontal: Align,
    vertical: Align,
)

Set popup header text

If text is null, popup header will not be rendered

Arguments

• popup - Popup instance
• text - text to be shown, can be multiline
• x - x position
• y - y position
• horizontal - horizontal alignment
• vertical - vertical alignment