code: public AwsSecurityFindingFilters withLastObservedAt(DateFilter... lastObservedAt) {
          if (this.lastObservedAt == null) {
              setLastObservedAt(new java.util.ArrayList<DateFilter>(lastObservedAt.length));
          }
          for (DateFilter ele : lastObservedAt) {
              this.lastObservedAt.add(ele);
          }
          return this;
      }
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>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setLastObservedAt(java.util.Collection)} or {@link #withLastObservedAt(java.util.Collection)} if you want
  to override the existing values.
  </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.
  @return Returns a reference to this object so that method calls can be chained together.