replace Form::getAttribute() with Form::getConfig()->getAttribute()
replace Form::getAttribute() with Form::getConfig()->getAttribute()

tackerm/SonataDoctrinePhpcrAdminBundle,peterkokot/SonataDoctrinePhpcrAdminBundle,sonata-project/SonataDoctrinePhpcrAdminBundle,tackerm/SonataDoctrinePhpcrAdminBundle,sonata-project/SonataDoctrinePhpcrAdminBundle,tackerm/SonataDoctrinePhpcrAdminBundle,sonata-project/SonataDoctrinePhpcrAdminBundle,tackerm/SonataDoctrinePhpcrAdminBundle