code: public SearchExpression withSubExpressions(SearchExpression... subExpressions) {
          if (this.subExpressions == null) {
              setSubExpressions(new java.util.ArrayList<SearchExpression>(subExpressions.length));
          }
          for (SearchExpression ele : subExpressions) {
              this.subExpressions.add(ele);
          }
          return this;
      }
docs: <p>
  A list of search expression objects.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSubExpressions(java.util.Collection)} or {@link #withSubExpressions(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param subExpressions
  A list of search expression objects.
  @return Returns a reference to this object so that method calls can be chained together.