public Context copy() {
            return new Context(this);
        }
Converts text into tokens in a tensor.
The information contained in the embedding may depend on the tensor type.

@param text the text to embed
@param context the context which may influence an embedder's behavior
@param tensorType the type of the tensor to be returned
@return the tensor embedding of the text, as the specified tensor type
@throws IllegalArgumentException if the language or tensor type is not supported by this embedder
linguistics/src/main/java/com/yahoo/language/process/Embedder.java