#[repr(C)]
pub struct GtkSpinButtonClass {
    pub parent_class: GtkEntryClass,
    pub input: Option<unsafe extern "C" fn(_: *mut GtkSpinButton, _: *mut c_double) -> c_int>,
    pub output: Option<unsafe extern "C" fn(_: *mut GtkSpinButton) -> c_int>,
    pub value_changed: Option<unsafe extern "C" fn(_: *mut GtkSpinButton)>,
    pub change_value: Option<unsafe extern "C" fn(_: *mut GtkSpinButton, _: GtkScrollType)>,
    pub wrapped: Option<unsafe extern "C" fn(_: *mut GtkSpinButton)>,
    pub _gtk_reserved1: Option<unsafe extern "C" fn()>,
    pub _gtk_reserved2: Option<unsafe extern "C" fn()>,
    pub _gtk_reserved3: Option<unsafe extern "C" fn()>,
    pub _gtk_reserved4: Option<unsafe extern "C" fn()>,
}
Fields
                           
                           parent_class: GtkEntryClass
                           
                           
                           input: Option<unsafe extern "C" fn(_: *mut GtkSpinButton, _: *mut c_double) -> c_int>
                           
                           
                           output: Option<unsafe extern "C" fn(_: *mut GtkSpinButton) -> c_int>
                           
                           
                           value_changed: Option<unsafe extern "C" fn(_: *mut GtkSpinButton)>
                           
                           
                           change_value: Option<unsafe extern "C" fn(_: *mut GtkSpinButton, _: GtkScrollType)>
                           
                           
                           wrapped: Option<unsafe extern "C" fn(_: *mut GtkSpinButton)>
                           
                           
                           _gtk_reserved1: Option<unsafe extern "C" fn()>
                           
                           
                           _gtk_reserved2: Option<unsafe extern "C" fn()>
                           
                           
                           _gtk_reserved3: Option<unsafe extern "C" fn()>
                           
                           
                           _gtk_reserved4: Option<unsafe extern "C" fn()>