Concepts bodies are now evaluated on demand

src/core/sheerka/ExecutionContext.py

@@ -60,6 +60,7 @@ class ExecutionContext:
         self.children = []
         self.preprocess = None
         self.logger = logger
+        self.extra_info = []
 
         self.inputs = {}  # what was the parameters of the execution context
         self.values = {}  # what was produced by the execution context
@@ -210,11 +211,11 @@ class ExecutionContext:
             self.sheerka,
             desc,
             logger,
-            **_kwargs,
-        )
+            **_kwargs)
         new._parent = self
         new._tab = self._tab + " " * DEBUG_TAB_SIZE
         new.preprocess = self.preprocess
+        new.extra_info.extend(self.extra_info)
 
         self.children.append(new)
         return new