function unwrapBlock(removedLength, state) {
  let change = state.change();
  change = unwrapBlockForChange(removedLength, change);
  return change.state;
}
/**
 * Unwrap block
 *
 * @param removedLength - first length should be removed
 * @param state - editor state
 */
Unwrap block
@param removedLength - first length should be removed
@param state - editor state
Unwrap block @param removedLength - first length should be removed @param state - editor state
function unwrapBlock(removedLength, state) {
  let change = state.change();
  change = unwrapBlockForChange(removedLength, change);
  return change.state;
}
function unwrapBlock ( removedLength , state ) { let change = state . change ( ) ; change = unwrapBlockForChange ( removedLength , change ) ; return change . state ; }
Unwrap block
 @param removedLength - first length should be removed
 @param state - editor state
Unwrap block @param removedLength - first length should be removed @param state - editor state