code: def alias_clause(self, tree):
      alias_name = None
      column_list = []
  
      for child in tree.children:
          if isinstance(child, Tree):
              if child.data == "uid":
                  alias_name = self.visit(child)
              elif child.data == "uid_list":
                  column_list = self.visit(child)
                  column_list = [col.name for col in column_list]
  
      return Alias(alias_name, column_list)
  
imports: from lark import Token, Tree
  from evadb.expression.tuple_value_expression import TupleValueExpression
  from evadb.parser.select_statement import SelectStatement
  from evadb.parser.table_ref import Alias, JoinNode, TableRef, TableValuedExpression
  from evadb.parser.types import JoinType
  from evadb.utils.logging_manager import logger
label_desc: Use image node_id 14 for calling the TableSources obj's underlying member method code with example usage: obj.alias_clause(tree) and returns: Alias