[core] add get(axis) function for :class:`AcquisitionDims`

id06workflow/core/experiment/__init__.py

@@ -369,6 +369,18 @@ class AcquisitionDims(object):
             max_index = max(max_index, index)
         return max(max_index, 0) + 1
 
+    def get(self, axis):
+        """
+
+        :param int axis: axis for which we want the dimension definition
+        :return: the requested dim if exists
+        """
+        assert type(axis) is int
+        if axis in self.__dims:
+            return self.__dims[axis]
+        else:
+            return None
+
     @property
     def shape(self):
         """