public void setProperty(String name, Object value) {
            traceNode.add(new TraceNode(new Pair<>(name, value), 0));
        }
Adds a property key-value to this trace.
Values are looked up by reverse depth-first search in the trace node tree.

@param name  the name of the property
@param value the value of the property, or null to set this property to null
container-core/src/main/java/com/yahoo/processing/execution/Execution.java