String actualLocations = actual.getProblems().stream()
                    .map(p -> formatLocation(p.getColumnNumber(), p.getLineNumber()))
                    .collect(joining(", "));
            String message = String.format(
                    "Expected ProjectBuildingResult to have location <%s> but had locations <%s>",
                    formatLocation(columnNumber, lineNumber), actualLocations);
            assertTrue(false, message);

                    conflicts.add(String.format(
                            "Conflicting extension %s: %s vs %s",
                            key,
                            formatLocation(conflict.getLocation("")),
                            formatLocation(coreExtension.getLocation(""))));
                }
            }
        }
        if (!conflicts.isEmpty()) {

                if (request.isShowErrors()) { // this means -e or -X (as -X enables -e as well)
                    for (ModelProblem problem : result.getProblems()) {
                        String loc = ModelProblemUtils.formatLocation(problem, result.getProjectId());
                        LOGGER.warn("{}{}", problem.getMessage(), ((loc != null && !loc.isEmpty()) ? " @ " + loc : ""));
                    }
                }
            }
        }