SNOW-1234800 SNOW-939204 : Converting Structured and Semi-Structured Types with cast()

Is there any example of converting Structured and Semi-Structured types with Column cast()
e.g., how to convert the following SQL to Snowpark

select CAST (UNSTRCUTURED_ARRAY AS ARRAY(VARCHAR)) AS STRCUTURED_ARRAY ;

What is the current behavior?

from snowflake.snowpark import functions as F
from snowflake.snowpark import types as T

df.filter(F.array_contains(F.lit('Key'), F.expr('CAST (KEY_UNSTRCUTURED_ARRAY AS ARRAY(VARCHAR))'))).show()

What is the desired behavior?

df.filter(F.array_contains(F.lit('Key'), F.col('KEY_UNSTRCUTURED_ARRAY ').cast('ARRAY(VARCHAR)')).show()
# or
df.filter(F.array_contains(F.lit('Key'), F.col('KEY_UNSTRCUTURED_ARRAY ').cast(T.ArraryType(T.StringType()))).show()

How would this improve snowflake-snowpark-python?

References, Other Background

Converting Structured and Semi-Structured Types
https://docs.snowflake.com/en/sql-reference/data-types-structured#label-structured-types-casting