The declaration
list< element_type> field;
declares a simple list with the following methods:
| void append_ field( element_type x); |
| int get_ field_count() const; |
| Iter< element_type> get_ field_iterator(); |
| void insert_ field(int pos, element_type x); |
| element_type remove_ field(int pos); |
| element_type get_ field(int pos); |