added what if

src/lib.rs

@@ -12,6 +12,7 @@ mod subjects;
 mod substitutions;
 mod themes;
 mod user;
+mod what_if;
 
 pub use absence::{Absence, AbsenceListItem, SubjectAbsence};
 pub use api_info::ApiInfo;
@@ -27,3 +28,4 @@ pub use subjects::{Subject, Subjects};
 pub use substitutions::{SubstitutionChange, Substitutions};
 pub use themes::{Theme, Themes};
 pub use user::{Module, User};
+pub use what_if::{WhatIfResult, WhatIfResultMark, WhatIfStartingEnviromentMark};