| Interface | Description | 
|---|---|
| Processor | Interface for defining a custom Processor that can modify or validate GrooCSS input. | 
| Class | Description | 
|---|---|
| PlaceholderProcessor | Finds any StyleGroup with placeholder in it and adds a copy of it with -webkit-input- prefix added to placeholder. | 
| Enum | Description | 
|---|---|
| Processor.Phase | Enum of phases for which this Processor should be called. |