https://2022.help.altair.com/2022/hwdesktop/hwd/topics/reference/tcl/mdliobject_beginflatlistfastget.htm
mdlIObject BeginFlatListFastGet
Obtains the list of the entities present in the model based on the entity type specified.
https://help.altair.com/hwdesktop/hwd/topics/reference/tcl/mdliobject_isinstandardinclude.htm
mdlIObject IsInStandardInclude
Determines whether the object is included in the standard include file.