original_string: protected function explicitlyConfiguredForeignKeysNullable()
      {
          $nullable = array_get($this->formFieldData->options(), 'nullable_key');
  
          if (null === $nullable) return null;
  
          return (bool) $nullable;
      }
code: protected function explicitlyConfiguredForeignKeysNullable()
      {
          $nullable = array_get($this->formFieldData->options(), 'nullable_key');
  
          if (null === $nullable) return null;
  
          return (bool) $nullable;
      }
code_tokens: protected function explicitlyConfiguredForeignKeysNullable ( ) { $ nullable = array_get ( $ this -> formFieldData -> options ( ) , 'nullable_key' ) ; if ( null === $ nullable ) return null ; return ( bool ) $ nullable ; }
docstring: Returns whether the relation's foreign keys were configured nullable.
  
  @return bool|null    null if the nullabillity of the keys was not configured
docstring_tokens: Returns whether the relation s foreign keys were configured nullable .