Just that it is different beast
Specify a Parameter with a default value and arbitrary number of additional attributes.
name : str
Name of the parameter under which it should be available in its respective collection.
doc : str
Documentation about the purpose of this parameter.
index : int or None
Index of parameter among the others. Determines order of listing in help. If None, order of instantiation determines the index.
ro : bool
Either value which will be assigned in the constructor is read-only and cannot be changed
value :
Actual value of the parameter to be assigned
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