EmailLocal returns a new list which is a result of getting the local part of each email from the input list.

NewAnyMatcher returns a matcher function based on incoming values.

NewMatcher parses a matcher expression.

NewTraitsTemplateExpression parses expressions like {{external.foo}} or {{internal.bar}}, or a literal value like "prod".

RegexpReplace returns a new list which is the result of replacing each instance of [match] with [replacement] for each item in the input list.

EmailLocalFnName is a name for email.local function.

RegexpMatchFnName is a name for regexp.match function.

RegexpNotMatchFnName is a name for regexp.not_match function.

RegexpReplaceFnName is a name for regexp.replace function.

MatchExpression is a match expression.

TraitsTemplateExpression can interpolate user trait values into a string template to produce some values.

Matcher matches strings against some internal criteria (e.g.

MatcherFn converts function to a matcher interface.