@Override
        public boolean equals(Object o) {
            if (o == this) {
                return true;
            } else if (o instanceof FactoryExpressionWrapper) {
                return expr.equals(((FactoryExpressionWrapper) o).expr);
            } else {
                return false;
            }
        }
Common superclass for {@link FactoryExpression} implementations

@param <T>
querydsl-core/src/main/java/com/querydsl/core/types/FactoryExpressionBase.java