interface FormExtensionInterface
Interface for extensions which provide types, type extensions and a guesser.
| FormTypeInterface |  getType(string $name)  Returns a type by name.  |  |
| bool |  hasType(string $name)  Returns whether the given type is supported.  |  |
| FormTypeExtensionInterface[] |  getTypeExtensions(string $name)  Returns the extensions for the given type.  |  |
| bool |  hasTypeExtensions(string $name)  Returns whether this extension provides type extensions for the given type.  |  |
| FormTypeGuesserInterface|null |  getTypeGuesser()  Returns the type guesser provided by this extension.  |  
Returns a type by name.
| string | $name | The name of the type | 
| FormTypeInterface | The type | 
| InvalidArgumentException | if the given type is not supported by this extension | 
Returns whether the given type is supported.
| string | $name | The name of the type | 
| bool | Whether the type is supported by this extension | 
Returns the extensions for the given type.
| string | $name | The name of the type | 
| FormTypeExtensionInterface[] | An array of extensions as FormTypeExtensionInterface instances | 
Returns whether this extension provides type extensions for the given type.
| string | $name | The name of the type | 
| bool | Whether the given type has extensions | 
Returns the type guesser provided by this extension.
| FormTypeGuesserInterface|null | The type guesser | 
    © 2004–2017 Fabien Potencier
Licensed under the MIT License.
    https://api.symfony.com/4.1/Symfony/Component/Form/FormExtensionInterface.html