class_docstr: Represents a reference to a SQL column.
class_docstr_tok: ["Represents","a","reference","to","a","SQL","column","."]
code: def from_string(sql_str: str) -> SqlColumn:  # noqa: D
      table_str, column_name = sql_str.rsplit(".", 1)
      table = SqlTable.from_string(table_str)
      return SqlColumn(table=table, column_name=column_name)
  
file_path: metricflow/metricflow/dataflow/sql_column.py
imports: from __future__ import annotations
  from typing import Optional
  from dbt_semantic_interfaces.implementations.base import FrozenBaseModel
  from metricflow.dataflow.sql_table import SqlTable
label_desc: Use image node_id 2 for calling the SqlColumn obj's underlying member method code with example usage: obj.from_string(sql_str) and returns: SqlColumn