addFilter method

void addFilter(
  1. List<String> names,
  2. String func(
    1. String
    )
)

Add a filter.

socials.addFilter(
  <String>['upper', 'uppercase', 'touppercase'], (String value) =>
    value.toUpperCase());

Implementation

void addFilter(List<String> names, String Function(String) func) {
  for (final String name in names) {
    if (filters.containsKey(name)) {
      throw DuplicateNameError(name);
    }
    filters[name] = func;
  }
}