String filepath = ProjectUtils.getFilePath(project, file);
List<IProblem> problems = requestor.getProblems();
FileOffsets offsets = FileOffsets.compile(filepath);
for (IProblem problem : problems){
int[] lineColumn = offsets.offsetToLineColumn(problem.getOffset());
Error error = new Error(
problem.getUnmodifiedMessage(), filepath,
lineColumn[0], lineColumn[1],
problem.isWarning());
if(!errors.contains(error)){