<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def contains_array(store, path=None):
 """Return True if the store contains an array at the given logical path."""

    path = normalize_storage_path(path)
    prefix = _path_to_prefix(path)
    key = prefix + array_meta_key
    return key in store