Create a type ref with given name and initial denotation
Create type ref to given symbol
Create type ref with given prefix and name
Create a non-member type ref (which cannot be reloaded using member
),
with given prefix, name, and symbol.
Create a type ref referring to given symbol with given name.
Create a type ref referring to given symbol with given name. This is very similar to TypeRef(Type, Symbol), except for two differences: (1) The symbol might not yet have a denotation, so the name needs to be given explicitly. (2) The name in the type ref need not be the same as the name of the Symbol.