def complete_operator(node)
      definition.operator_by_field_name(node.value).map { |o| o.end_with?(' ') ? o : "#{o} " }
    end
def complete_operator(node)
      definition.operator_by_field_name(node.value).map { |o| o.end_with?(' ') ? o : "#{o} " }
    end
This method complete infix operators by field type