code: public void setExcludedContentMetadata(com.google.api.ads.admanager.axis.v201805.ContentMetadataKeyHierarchyTargeting[] excludedContentMetadata) {
          this.excludedContentMetadata = excludedContentMetadata;
      }
docs: Sets the excludedContentMetadata value for this ContentTargeting.
  
  @param excludedContentMetadata   * A list of content metadata within hierarchies that are being
  excluded by the {@code LineItem}.