Validate a Sensu extension definition. Validates: gem, version
@param filter [Hash] sensu extension definition.
# File lib/sensu/settings/validators/extension.rb, line 9 def validate_extension(extension) must_be_a_string_if_set(extension[:gem]) || invalid(extension, "extension gem must be a string") must_be_a_string_if_set(extension[:version]) || invalid(extension, "extension version must be a string") end