/*! This value determines how the value is to be presented
** to the user when editing visually. */
ParamDesc &set_scalar(const Real &n) { scalar_=n; return *this; }
- ParamDesc &set_scalar(const String &h) { hint_=h; return *this; }
//! Marks the parameter as not necessary for saving or copying
ParamDesc ¬_critical() { critical_=false; return *this; }