public Object getProperty(String name) {
        return owner.getModel().getExecution().trace().getProperty(name);
    }
Returns a property set anywhere in this context.
Note that even though this call is itself "thread robust", the object values returned
may in some scenarios not be written behind a synchronization barrier, so when accessing
objects which are not inherently thread safe, synchronization should be considered.
<p>
Note that this method have a time complexity which is proportional to
the number of cloned/created queries times the average number of properties in each.
container-search/src/main/java/com/yahoo/search/query/context/QueryContext.java