code: public CustomizedScalingMetricSpecification withDimensions(MetricDimension... dimensions) {
          if (this.dimensions == null) {
              setDimensions(new java.util.ArrayList<MetricDimension>(dimensions.length));
          }
          for (MetricDimension ele : dimensions) {
              this.dimensions.add(ele);
          }
          return this;
      }
docs: <p>
  The dimensions of the metric.
  </p>
  <p>
  Conditional: If you published your metric with dimensions, you must specify the same dimensions in your
  customized scaling metric specification.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDimensions(java.util.Collection)} or {@link #withDimensions(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param dimensions
  The dimensions of the metric.</p>
  <p>
  Conditional: If you published your metric with dimensions, you must specify the same dimensions in your
  customized scaling metric specification.
  @return Returns a reference to this object so that method calls can be chained together.