code: public StackResourceDrift withPropertyDifferences(PropertyDifference... propertyDifferences) {
          if (this.propertyDifferences == null) {
              setPropertyDifferences(new com.amazonaws.internal.SdkInternalList<PropertyDifference>(propertyDifferences.length));
          }
          for (PropertyDifference ele : propertyDifferences) {
              this.propertyDifferences.add(ele);
          }
          return this;
      }
docs: <p>
  A collection of the resource properties whose actual values differ from their expected values. These will be
  present only for resources whose <code>StackResourceDriftStatus</code> is <code>MODIFIED</code>.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPropertyDifferences(java.util.Collection)} or {@link #withPropertyDifferences(java.util.Collection)}
  if you want to override the existing values.
  </p>
  
  @param propertyDifferences
  A collection of the resource properties whose actual values differ from their expected values. These will
  be present only for resources whose <code>StackResourceDriftStatus</code> is <code>MODIFIED</code>.
  @return Returns a reference to this object so that method calls can be chained together.