Module types access
| copyval | 
     Perform an assignment between two objects of the same external type.
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| dsotypfromstr | 
     Initialise an object of a module type using a string.
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| dsotyptostr | 
     Get a string representation from a module type reference.
     | 
| findattrdesc | 
     Find an attribute descriptor from its name.
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| getattr | 
     Get an attribute of an entity.
     | 
 
