AppendTo uses reflection to form encode into the given values collection based off the form tags that it defines.

AppendToPrefixed is the same as AppendTo, but it allows a slice of key parts to be specified to prefix the form values.

FormatKey takes a series of key parts that may be parameter keyParts, map keys, or array indices and unifies them into a single key suitable for Stripe's style of form encoding.

Strict enables strict mode wherein the package will panic on an AppendTo function if it finds that a tag string was malformed.

Values is a collection of values that can be submitted along with a request that specifically allows for duplicate keys and encodes its entries in the same order that they were added.

Appender is the interface implemented by types that can append themselves to a collection of form values.