class RuboCop::Cop::Layout::IndentationConsistency

def base_column_for_normal_style(node)

is not an access modifier.
indicate that the correct indentation is that of the first child that
Returns an integer representing the correct indentation, or nil to 
def base_column_for_normal_style(node)
  first_child = node.children.first
  return unless first_child && bare_access_modifier?(first_child)
  # If, as is most common, the access modifier is indented deeper than
  # the module (`access_modifier_indent > module_indent`) then the
  # indentation of the access modifier determines the correct
  # indentation.
  #
  # Otherwise, in the rare event that the access modifier is outdented
  # to the level of the module (see `AccessModifierIndentation` cop) we
  # return nil so that `check_alignment` will derive the correct
  # indentation from the first child that is not an access modifier.
  access_modifier_indent = display_column(first_child.source_range)
  return access_modifier_indent unless node.parent
  module_indent = display_column(node.parent.source_range)
  access_modifier_indent if access_modifier_indent > module_indent
end