code: public DetectEntitiesResult withUnmappedAttributes(UnmappedAttribute... unmappedAttributes) {
          if (this.unmappedAttributes == null) {
              setUnmappedAttributes(new java.util.ArrayList<UnmappedAttribute>(unmappedAttributes.length));
          }
          for (UnmappedAttribute ele : unmappedAttributes) {
              this.unmappedAttributes.add(ele);
          }
          return this;
      }
docs: <p>
  Attributes extracted from the input text that we were unable to relate to an entity.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUnmappedAttributes(java.util.Collection)} or {@link #withUnmappedAttributes(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param unmappedAttributes
  Attributes extracted from the input text that we were unable to relate to an entity.
  @return Returns a reference to this object so that method calls can be chained together.