code: def dimension_helper(self, tree):
      dimensions = []
      for child in tree.children:
          if isinstance(child, Tree):
              if child.data == "decimal_literal":
                  decimal = self.visit(child)
                  dimensions.append(decimal)
      return tuple(dimensions)
  
imports: from lark import Tree
  from evadb.catalog.catalog_type import ColumnType, NdArrayType, VectorStoreType
  from evadb.expression.tuple_value_expression import TupleValueExpression
  from evadb.parser.create_index_statement import CreateIndexStatement
  from evadb.parser.create_statement import ColConstraintInfo, ColumnDefinition, CreateDatabaseStatement, CreateJobStatement, CreateTableStatement
  from evadb.parser.table_ref import TableRef
  from evadb.parser.types import ColumnConstraintEnum
label_desc: Use image node_id 13 for calling the CreateTable obj's underlying member method code with example usage: obj.dimension_helper(tree) and returns: tuple