If refactoring feature, such as Change Method
Parameters, adds the usage of type T, it needs to
check the source code and add import statement for
that type to avoid 'unresolved symbol' error and
manual steps for fixing that.

Comments from the NetBeans 4.0 Beta 2 feedback:
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I had this constructor:
    Position(Node node, int offset)

and I added a third parameter like this:
    Position(Node node, int offset, Bias bias)

'with a default value of Bias.FORWARD.

Bias is in the same package as this class (Position).

However, in all the references in other packages
to this constructor, it failed to import the Bias
class. Thus when I try to compile after the
refactoring, I get "cannot resolve symbol" on
Bias. Now I have to go and manually import it in
each of the referencing classes (there are many). 
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