compat/maven-model-builder/src/main/java/org/apache/maven/model/validation/DefaultModelValidator.java [1689:1720]:
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    private static InputLocation getLocation(String fieldName, InputLocationTracker tracker) {
        InputLocation location = null;

        if (tracker != null) {
            if (fieldName != null) {
                Object key = fieldName;

                int idx = fieldName.lastIndexOf('.');
                if (idx >= 0) {
                    fieldName = fieldName.substring(idx + 1);
                    key = fieldName;
                }

                if (fieldName.endsWith("]")) {
                    key = fieldName.substring(fieldName.lastIndexOf('[') + 1, fieldName.length() - 1);
                    try {
                        key = Integer.valueOf(key.toString());
                    } catch (NumberFormatException e) {
                        // use key as is
                    }
                }

                location = tracker.getLocation(key);
            }

            if (location == null) {
                location = tracker.getLocation(EMPTY);
            }
        }

        return location;
    }
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impl/maven-impl/src/main/java/org/apache/maven/impl/model/DefaultModelValidator.java [2186:2217]:
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    private static InputLocation getLocation(String fieldName, InputLocationTracker tracker) {
        InputLocation location = null;

        if (tracker != null) {
            if (fieldName != null) {
                Object key = fieldName;

                int idx = fieldName.lastIndexOf('.');
                if (idx >= 0) {
                    fieldName = fieldName.substring(idx + 1);
                    key = fieldName;
                }

                if (fieldName.endsWith("]")) {
                    key = fieldName.substring(fieldName.lastIndexOf('[') + 1, fieldName.length() - 1);
                    try {
                        key = Integer.valueOf(key.toString());
                    } catch (NumberFormatException e) {
                        // use key as is
                    }
                }

                location = tracker.getLocation(key);
            }

            if (location == null) {
                location = tracker.getLocation(EMPTY);
            }
        }

        return location;
    }
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