public String getShortName(String fullName) {
    return getShortName(fullName, true);
  }
Check whether the package-less name ClassName is shaded by variable in a context of
the decompiled class
@param classToName - pkg.name.ClassName - class to find shortname for
@return ClassName if the name is not shaded by local field, pkg.name.ClassName otherwise
src/org/jetbrains/java/decompiler/main/collectors/ImportCollector.java