code: public QueryInfo withSelectFields(FieldInfo... selectFields) {
          if (this.selectFields == null) {
              setSelectFields(new com.amazonaws.internal.SdkInternalList<FieldInfo>(selectFields.length));
          }
          for (FieldInfo ele : selectFields) {
              this.selectFields.add(ele);
          }
          return this;
      }
docs: <p>
  Returns a <code>FieldInfo</code> object.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSelectFields(java.util.Collection)} or {@link #withSelectFields(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param selectFields
  Returns a <code>FieldInfo</code> object.
  @return Returns a reference to this object so that method calls can be chained together.