register_vardict_schema
Description:
Register schema for fields in a model containing column with variant dictionary schema ('a{sv}').
The keys registered with this function can be later used with dee_model_build_named_row function, as well as
get_value_by_name. Note that it is possible to register the same
field name for multiple columns, in which case you need to use fully-qualified "column_name::field" name in the calls to
dee_model_build_named_row and get_field_schema.
Parameters:
| this |
a Model |
| schemas |
hashtable with keys specifying names of the fields and values defining their schema |
| column |
the column index to register the schemas with |