instead of the pre-typechecked type and the referenced decl in the AST
so that we can suggests all overloads even if it happen to be
typechecked to a method. For example
struct MyType {
func foo() {}
func foo(_ int: Int) {}
func foo(name: String, value: String) {}
}
func test(val: MyType) {
value.foo(#^COMPLETE^#)
}
In this case, the call is typechecked to 'MyType.foo(_:)', but we want
to suggest all overloads.
rdar://problem/59285399
