in src/main/java/org/apache/sling/query/impl/selector/HierarchyOperator.java [78:88]
public abstract <T> Function<?, ?> getFunction(SelectorSegment segment, SearchStrategy strategy,
TreeProvider<T> provider);
public static HierarchyOperator findByCharacter(char c) {
for (HierarchyOperator operator : values()) {
if (operator.c == c) {
return operator;
}
}
return NOOP;
}