static String anonFunctionHeader(Type requiredType, Unit unit) {
StringBuilder text = new StringBuilder();
text.append("(");
boolean first = true;
char c = 'a';
List<Type> argTypes = unit.getCallableArgumentTypes(requiredType);
for (Type paramType : argTypes) {
if (first) {
first = false;
} else {
text.append(", ");
}
text.append(paramType.asSourceCodeString(unit)).append(" ").append(c++);
}
text.append(")");
return text.toString();
}
