add deprecation warning

weldx/transformations/cs_manager.py

@@ -14,7 +14,7 @@
 
 from weldx import util
 from weldx.core import TimeSeries
-from weldx.exceptions import WeldxException
+from weldx.exceptions import WeldxDeprecationWarning, WeldxException
 from weldx.geometry import SpatialData
 from weldx.time import Time, types_time_like, types_timestamp_like
 from weldx.util import check_matplotlib_available, dataclass_nested_eq
@@ -441,6 +441,7 @@ def add_cs(
         reference_system_name: str,
         lcs: LocalCoordinateSystem,
         lcs_child_in_parent: bool = True,
+        lsc_child_in_parent: bool = True,
     ):
         """Add a coordinate system to the coordinate system manager.
 
@@ -473,8 +474,22 @@ def add_cs(
             If set to `True`, the passed `LocalCoordinateSystem` instance describes
             the new system orientation towards is parent. If `False`, it describes
             how the parent system is positioned in its new child system.
+        lsc_child_in_parent
+            DEPRECATED. Use ``lcs_child_in_parent`` instead.
 
         """
+        if not lsc_child_in_parent:
+            warnings.warn(
+                (
+                    "Argument 'lsc_child_in_parent' is deprecated"
+                    " and will be removed in 0.7 please use 'lcs_child_in_parent'"
+                ),
+                category=WeldxDeprecationWarning,
+                stacklevel=2,
+            )
+            if lcs_child_in_parent:
+                lcs_child_in_parent = lsc_child_in_parent
+
         if not isinstance(lcs, LocalCoordinateSystem):
             raise TypeError(
                 "'local_coordinate_system' must be an instance of LocalCoordinateSystem"