INVALID_CHAR_VARCHAR_COLLATION_METADATA error condition
Invalid CHAR/VARCHAR collation metadata.
INVALID_VALUE
The value <value> must be a provider-qualified, non-empty collation name.
RESERVED_METADATA_KEY
The metadata key <metadataKey> is reserved and cannot be provided by callers.
UNRECOGNIZED_PATH
The field path <fieldPath> does not identify an uncollated CHAR/VARCHAR type.