license docs-private export function getMatFormFieldPlaceholderConflictError ( ) { return Error ( 'Placeholder attribute and child element were both specified.' ) ; } docs-private export function getMatFormFieldDuplicatedHintError ( align ) { return Error ( `A hint was already declared for 'align="${ align }"'.` ) ; } docs-private export function getMatFormFieldMissingControlError ( ) { return Error ( 'mat-form-field must contain a MatFormFieldControl.' ) ; }