core/src/main/java/org/apache/brooklyn/core/workflow/ShorthandProcessorExprParser.java [309:327]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                    valueUpdater = v2 -> {
                        Map target = result;
                        for (int i=0; i<keys.length; i++) {
                            if (!Pattern.compile("[A-Za-z0-9_-]+").matcher(keys[i]).matches()) {
                                throw new IllegalArgumentException("Invalid variable '"+tt+"'");
                            }
                            if (i == keys.length - 1) {
                                target.compute(keys[i], (k, v) -> v == null ? v2 : v + " " + v2);
                            } else {
                                // need to make sure we have a map or null
                                target = (Map) target.compute(keys[i], (k, v) -> {
                                    if (v == null) return MutableMap.of();
                                    if (v instanceof Map) return v;
                                    return Maybe.absent("Cannot process shorthand for " + Arrays.asList(keys) + " because entry '" + k + "' is not a map (" + v + ")");
                                });
                            }
                        }
                    };
                    valueUpdater.accept(value);
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



core/src/main/java/org/apache/brooklyn/core/workflow/ShorthandProcessorQst.java [277:295]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                    valueUpdater = v2 -> {
                        Map target = result;
                        for (int i=0; i<keys.length; i++) {
                            if (!Pattern.compile("[A-Za-z0-9_-]+").matcher(keys[i]).matches()) {
                                throw new IllegalArgumentException("Invalid variable '"+tt+"'");
                            }
                            if (i == keys.length - 1) {
                                target.compute(keys[i], (k, v) -> v == null ? v2 : v + " " + v2);
                            } else {
                                // need to make sure we have a map or null
                                target = (Map) target.compute(keys[i], (k, v) -> {
                                    if (v == null) return MutableMap.of();
                                    if (v instanceof Map) return v;
                                    return Maybe.absent("Cannot process shorthand for " + Arrays.asList(keys) + " because entry '" + k + "' is not a map (" + v + ")");
                                });
                            }
                        }
                    };
                    valueUpdater.accept(value);
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -