get_item_attribute_value

Queries the item at position item_index in this for the attribute specified by attribute.

If expected_type is non-null then it specifies the expected type of the attribute. If it is null then any type will be accepted.

If the attribute exists and matches expected_type (or if the expected type is unspecified) then the value is returned.

If the attribute does not exist, or does not match the expected type then null is returned.

Parameters:

this	a MenuModel
item_index	the index of the item
attribute	the attribute to query
expected_type	the expected type of the attribute, or null

Returns:

the value of the attribute