Added highlight of calls within condition statements of if/else blocks

src/sequence_diagram/model/message.cc

@@ -50,4 +50,11 @@ void message::set_return_type(std::string t) { return_type_ = std::move(t); }
 
 const std::string &message::return_type() const { return return_type_; }
 
+void message::set_message_scope(common::model::message_scope_t scope)
+{
+    scope_ = scope;
+}
+
+common::model::message_scope_t message::message_scope() const { return scope_; }
+
 }

src/sequence_diagram/model/message.h

@@ -47,6 +47,9 @@ public:
     void set_return_type(std::string t);
     const std::string &return_type() const;
 
+    void set_message_scope(common::model::message_scope_t scope);
+    common::model::message_scope_t message_scope() const;
+
 private:
     common::model::message_t type_{common::model::message_t::kNone};
 
@@ -54,6 +57,9 @@ private:
 
     common::model::diagram_element::id_t to_{};
 
+    common::model::message_scope_t scope_{
+        common::model::message_scope_t::kNormal};
+
     // This is only for better verbose messages, we cannot rely on this
     // always
     std::string message_name_{};