copyToMethodBody function
Implementation
String copyToMethodBody(ClassElement clazz, Iterable<String> fields) {
final paramsInput = fields.fold(
"",
(r, field) => "$r ${field}: ${field} ?? this.${field},",
);
final typeParameters = clazz.typeParameters.isEmpty
? ''
: '<' + clazz.typeParameters.map((type) => type.name).join(',') + '>';
return '''return ${clazz.name}$typeParameters($paramsInput);''';
}