adds an integer field to the schema . concode_field_sep int length concode_elem_sep int type concode_elem_sep Map<String,FieldInfo> info concode_field_sep void add concode_elem_sep void addStringField concode_elem_sep void addAll concode_elem_sep void addField concode_elem_sep int length concode_elem_sep Collection<String> fields concode_elem_sep int type concode_elem_sep boolean hasField