void clearHeapHandle() { heapHandle_ = boost::none; }
lmm_variable_t getVariable() const { return variable_; }
void setVariable(lmm_variable_t var) { variable_ = var; }
void clearHeapHandle() { heapHandle_ = boost::none; }
lmm_variable_t getVariable() const { return variable_; }
void setVariable(lmm_variable_t var) { variable_ = var; }