class RuboCop::Cop::Layout::MultilineMethodCallIndentation

def semantic_alignment_base(node, rhs)

.c
a.b 
def semantic_alignment_base(node, rhs)
  return unless rhs.source.start_with?('.', '&.')
  node = semantic_alignment_node(node)
  return unless node&.loc&.selector && node.loc.dot
  node.loc.dot.join(node.loc.selector)
end