code: public RoleAssignmentInner create(String scope, String roleAssignmentName, RoleAssignmentProperties properties) {
          return createWithServiceResponseAsync(scope, roleAssignmentName, properties).toBlocking().single().body();
      }
docs: Creates a role assignment.
  
  @param scope The scope of the role assignment to create. The scope can be any REST resource instance. For example, use '/subscriptions/{subscription-id}/' for a subscription, '/subscriptions/{subscription-id}/resourceGroups/{resource-group-name}' for a resource group, and '/subscriptions/{subscription-id}/resourceGroups/{resource-group-name}/providers/{resource-provider}/{resource-type}/{resource-name}' for a resource.
  @param roleAssignmentName The name of the role assignment to create. It can be any valid GUID.
  @param properties Role assignment properties.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the RoleAssignmentInner object if successful.