resourcePolicy 
  A resource-based policy to include in the simulation provided as a string. Each resource in the simulation is treated as if it had this policy attached. You can include only one resource-based policy in a simulation.
The maximum length of the policy document that you can pass in this operation, including whitespace, is listed below. To view the maximum character counts of a managed policy with no whitespaces, see IAM and STS character quotas.
The regex pattern used to validate this parameter is a string of characters consisting of the following:
- Any printable ASCII character ranging from the space character ( - \u0020) through the end of the ASCII character range
- The printable characters in the Basic Latin and Latin-1 Supplement character set (through - \u00FF)
- The special characters tab ( - \u0009), line feed (- \u000A), and carriage return (- \u000D)
Simulation of resource-based policies isn't supported for IAM roles.