Is there a possibility to include a file that is already included - aws-cloudformation

Question

I have a situation:
Resources:
- ${file(resources/default-role.yml)}
- ${file(resources/secondary-role.yml)}
where default-role.yml:
Resources:
DefaultRoleForLambdas:
Type: AWS::IAM::Role
Properties:
RoleName: defaultRoleForLambdas
AssumeRolePolicyDocument:
Version: "2012-10-17"
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action: sts:AssumeRole
ManagedPolicyArns:
- arn:aws:iam::aws:policy/service-role/AWSLambdaVPCAccessExecutionRole
Policies:
- PolicyName: defaultPolicyForLambdas
PolicyDocument:
Version: "2012-10-17"
Statement:
- ${file(iam/s3-iam.yml):S3Policies}
- ${file(iam/dynamodb-iam.yml):DynamoDbPolicies}
So this would be my default role for provider iam roles.
In serverless:
iam:
role: DefaultRoleForLambdas
But I want to have some functions with role that have those 2 basic privileges + some others, so in secondary-role I have. I overwrite that role in this function:
handler: src/some-handler
role: SecondaryRoleForLambdas
Resources:
SecondaryRoleForLambdas:
Type: AWS::IAM::Role
Properties:
RoleName: secondaryRoleForLambdas
AssumeRolePolicyDocument:
Version: "2012-10-17"
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action: sts:AssumeRole
Policies:
- PolicyName: secondaryPolicyForLambdas
PolicyDocument:
Version: "2012-10-17"
Statement:
- ${file(iam/s3-iam.yml):S3Policies}
- ${file(iam/dynamodb-iam.yml):DynamoDbPolicies}
- ${file(iam/sqs-iam.yml):SqSPolicies}
For example sqs-iam.yml:
SqsIam:
Effect: Allow
Action:
- sqs:SendMessage
- sqs:ReceiveMessage
- sqs:DeleteMessage
- sqs:GetQueueAttributes
Resource:
- !Sub arn:aws:sqs:eu-west-1:${AWS::AccountId}:${self:service}-${self:provider.stage}*
I think you get my point now. I tried to add many roles for functions but it is not possible in serverelss AFAIK. (So when I have a default role - with s3 and dynamodb , I am not able to assign 2 roles to functions, so that 1 particular function would end up having those 3 polices), thats why I had to create a seperate role and repeat my two default policies and add particular one.
I thought I could improve my solution by having sth like this, but it does not work:
default-role.yml:
...
Statement:
- ${file(iam/common-iam.yml)}
secondary-role.yml:
...
- ${file(iam/common-iam.yml)}
- $file{(iam/sqs-iam.yml)}
where iam/common-iam.yml:
- ${file(iam/s3-iam.yml)}
- ${file(iam/dynamodb-iam.yml)}
But it does not work? Any ideas if that is even possible.