Function ImGui_InputTextEx 

pub unsafe extern "C" fn ImGui_InputTextEx(
    label: *const c_char,
    hint: *const c_char,
    buf: *mut c_char,
    buf_size: c_int,
    size_arg: *const ImVec2,
    flags: ImGuiInputTextFlags,
    callback: ImGuiInputTextCallback,
    user_data: *mut c_void,
) -> bool