Wordpress Option tree checkbox

I created 4 checkboxes in option tree. But i dont know how to check if checked some one.

if ( get_option_tree( 'cehckboxes' ) == 1 ) {
//do for first checkbox
}
if ( get_option_tree( 'cehckboxes' ) == 2 ) {
//do for second checkbox
}
if ( get_option_tree( 'cehckboxes' ) == 3 ) {
//do for 3. checkbox
}
if ( get_option_tree( 'cehckboxes' ) == 4 ) {
//do for 3. checkbox
}