You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: convert.go
    path of file: ./repos/trivy/pkg/iac/adapters/terraform/google/iam
    
    the code of the file until where you have to start completion: package iam

import (
	"github.com/aquasecurity/trivy/pkg/iac/providers/google/iam"
	"github.com/aquasecurity/trivy/pkg/iac/terraform"
	iacTypes "github.com/aquasecurity/trivy/pkg/iac/types"
)

func ParsePolicyBlock(block *terraform.Block) []iam.Binding {
	var bindings []iam.Binding
	for _, bindingBlock := range block.GetBlocks("binding") {
		binding := iam.Binding{
			Metadata:                      bindingBlock.GetMetadata(),
			Members:                       nil,
			Role
    
func ParsePolicyBlock(block *terraform.Block) []iam.Binding {
	var bindings []iam.Binding
	for _, bindingBlock := range block.GetBlocks("binding") {
		binding := iam.Binding{
			Metadata:                      bindingBlock.GetMetadata(),
			Members:                       nil,
			Role:                          bindingBlock.GetAttribute("role").AsStringValueOrDefault("", bindingBlock),
			IncludesDefaultServiceAccount: iacTypes.BoolDefault(false, bindingBlock.GetMetadata()),
		}
		membersAttr := bindingBlock.GetAttribute("members")
		members := membersAttr.AsStringValues().AsStrings()
		for _, member := range members {
			binding.Members = append(binding.Members, iacTypes.String(member, membersAttr.GetMetadata()))
		}
		bindings = append(bindings, binding)
	}
	return bindings
}