}

  class Builder
    @JvmOverloads
    constructor(private val charset: Charset? = null) {
      private val names = mutableListOf<String>()
      private val values = mutableListOf<String>()

      fun add(
        name: String,
        value: String,
      ) = apply {
        names +=
          name.canonicalizeWithCharset(
            encodeSet = FORM_ENCODE_SET,