Put back missing function

Author: Goran Jelic-Cizmek

src/nmodl/visitors/visitor_utils.cpp

@@ -302,5 +302,9 @@ bool is_nrn_pointing(const std::string& name) {
     return name == codegen::naming::NRN_POINTING_METHOD;
 }
 
+bool is_nrn_state_disc(const std::string& name) {
+    return name == codegen::naming::NRN_STATE_DISC_METHOD;
+}
+
 
 }  // namespace nmodl

src/nmodl/visitors/visitor_utils.hpp

@@ -147,4 +147,11 @@ bool is_random_construct_function(const std::string& name);
 /// Is given name `nrn_pointing`.
 bool is_nrn_pointing(const std::string& name);
 
+/**
+ * Checks if given function name is \c state_discontinuity
+ * \param name The function name to check
+ * \return     \c true if the function is state_discontinuity
+ */
+bool is_nrn_state_disc(const std::string& name);
+
 }  // namespace nmodl