vertx / io.vertx.rxjava.ext.web / ParsedHeaderValue / parameter

# parameter

`abstract fun parameter(key: String): String`

The value of the parameter specified by this key. Each is one of 3 things:

1. null <- That key was not specified
2. ParsedHeaderValue.EMPTY (tested using ==) <- The value was not specified
3. [Other] <- The value of the parameter

Note: The `q` parameter is never present.

### Parameters

`key` -

Return