public final void clearAll(String name, Object value, Map<String, String> context) {
        set(new CompoundName(name), value, context);
    }
Sets all properties having this name as a compound prefix to null.
I.e clearAll("a") will clear the value of "a" and "a.b" but not "ab".

@param name    the compound prefix of the properties to clear
@param context the context used to resolve where the values should be cleared, or null if none
@throws RuntimeException if no instance in the chain accepted this name-value pair
container-core/src/main/java/com/yahoo/processing/request/Properties.java