code: public AwsSecurityFindingFilters withThreatIntelIndicatorSource(StringFilter... threatIntelIndicatorSource) {
          if (this.threatIntelIndicatorSource == null) {
              setThreatIntelIndicatorSource(new java.util.ArrayList<StringFilter>(threatIntelIndicatorSource.length));
          }
          for (StringFilter ele : threatIntelIndicatorSource) {
              this.threatIntelIndicatorSource.add(ele);
          }
          return this;
      }
docs: <p>
  The source of the threat intel.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setThreatIntelIndicatorSource(java.util.Collection)} or
  {@link #withThreatIntelIndicatorSource(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param threatIntelIndicatorSource
  The source of the threat intel.
  @return Returns a reference to this object so that method calls can be chained together.