public void setEffectiveDateTime(java.util.Date effectiveDateTime) {
        this.effectiveDateTime = effectiveDateTime;
    }
<p>
The effective date and time of the pricing plan.
</p>

@param effectiveDateTime
       The effective date and time of the pricing plan.
aws-java-sdk-iottwinmaker/src/main/java/com/amazonaws/services/iottwinmaker/model/PricingPlan.java