void replaceBooleanWithTrue(Boolean *bexpr);
void replaceBooleanWithFalse(Boolean *bexpr);
void replaceBooleanWithBoolean(Boolean *oldb, Boolean *newb);
void replaceBooleanWithTrue(Boolean *bexpr);
void replaceBooleanWithFalse(Boolean *bexpr);
void replaceBooleanWithBoolean(Boolean *oldb, Boolean *newb);