An object that represents a negative phrase.
Each negative phrase will be used to populate an app-level negative training set. This set will contain phrases that will
completely bypass your app.
Creates an instance from a string interpolation.
Most `StringInterpolation` types will store information about the
literals and interpolations appended to them in one or more properties.
`init(stringInterpolation:)` should use these properties to initialize
the instance.
- Parameter stringInterpolation: An instance of `StringInterpolation`
which has had each segment of the string literal appended
to it.