code: public void setLastObservedAt(java.util.Collection<DateFilter> lastObservedAt) {
          if (lastObservedAt == null) {
              this.lastObservedAt = null;
              return;
          }
  
          this.lastObservedAt = new java.util.ArrayList<DateFilter>(lastObservedAt);
      }
docs: <p>
  An ISO8601-formatted timestamp that indicates when the potential security issue captured by a finding was most
  recently observed by the security findings provider.
  </p>
  
  @param lastObservedAt
  An ISO8601-formatted timestamp that indicates when the potential security issue captured by a finding was
  most recently observed by the security findings provider.