@Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof ExpressionItem)) {
            return false;
        }
        final ExpressionItem that = (ExpressionItem) o;
        return Objects.equals(enabled, that.enabled);
    }
@param predicate Test to run on each term in the expression
@return True if any term matches predicate
stroom-query/stroom-query-api/src/main/java/stroom/query/api/ExpressionItem.java