serverless.yml with subscription filters

serverless.yml

service: subscription-filter-service

provider:
  name: aws
  runtime: nodejs8.10
  stage: dev
  region: us-east-1
  
functions:
  hello2:
    handler: handler2.hello
    events:
      - cloudwatchLog: '/aws/lambda/subscription-test-2'
  hello3:
    handler: handler3.hello
    events:
      - cloudwatchLog: '/aws/lambda/subscription-test-1'      
  hello:
    handler: handler.hello
    events:
      - cloudwatchLog: '/aws/lambda/subscription-test-3'

package:
  exclude:
    - node_modules/**      

resources:
  Resources:
    testLogGroup1:
      Type: AWS::Logs::LogGroup
      Properties: 
        LogGroupName: '/aws/lambda/subscription-test-1'
        RetentionInDays: 1
    testLogGroup2:
      Type: AWS::Logs::LogGroup
      Properties: 
        LogGroupName: '/aws/lambda/subscription-test-2'
        RetentionInDays: 1
    testLogGroup3:
      Type: AWS::Logs::LogGroup
      Properties: 
        LogGroupName: '/aws/lambda/subscription-test-3'
        RetentionInDays: 1