ngDirectiveDefinitionBool   :: DirectiveDefinition -> String -> Bool -> Fay()
ngDirectiveDefinitionBool   = ffi "%1[%2] = %3"
ngDirectiveDefinitionBool   :: DirectiveDefinition -> String -> Bool -> Fay()
ngDirectiveDefinitionBool   = ffi "%1[%2] = %3"
ngDirectiveDefinitionBool   = ffi "%1[%2] = %3"