code: func (obj *Doc) ExpandExpression(ctx context.Context, expression string) (string, error) {
  	result := &struct {
  		ExpandedExpression string	`json:"qExpandedExpression"`
  	} {}
  	err := obj.rpc(ctx, "ExpandExpression", result, expression)
  	return result.ExpandedExpression, err 
  }
docs: // Expands the expression.
  //
  // Parameters:
  //
  // ◾ expression   -   The expression string to expand.
  //