_context.getDocumentPosition() + dotId.beginColumn - 1;
final int length = dotId.endColumn - dotId.beginColumn + 1;
final DotOperator dotOp = new DotOperator(_diagnosticFactory, _targetFile, _symbolResolver);
final StringLiteralType suffixLiteral = new StringLiteralType(dotId.image);
final Diagnostic diagnostic =
dotOp.validate(symbolType,
suffixLiteral);
if (diagnostic.getSeverity() != Diagnostic.OK)