Rename Resource.Type() to Resource.SchemaType()

Since block.SetType () sets the block of type (i.e. `resource`),
it's confusing for Resource.Type () to return the resource type (i.e.
aws_s3_bucket) instead of the the `resource` literal.
Give different names to different things.

tfwrite/resource.go

@@ -25,10 +25,10 @@ func NewEmptyResource(resourceType string, resourceName string) *Resource {
 	return NewResource(block)
 }
 
-// Type returns a type of resource.
+// SchemaType returns a type of resource.
 // It returns the first label of block.
 // Note that it's not the same as the *hclwrite.Block.Type().
-func (r *Resource) Type() string {
+func (r *Resource) SchemaType() string {
 	labels := r.block.raw.Labels()
 	return labels[0]
 }
@@ -43,7 +43,7 @@ func (r *Resource) Name() string {
 // another resource.
 func (r *Resource) SetAttributeByReference(name string, refResource *Resource, refAttribute string) {
 	traversal := hcl.Traversal{
-		hcl.TraverseRoot{Name: refResource.Type()},
+		hcl.TraverseRoot{Name: refResource.SchemaType()},
 		hcl.TraverseAttr{Name: refResource.Name()},
 		hcl.TraverseAttr{Name: refAttribute},
 	}

tfwrite/resource_test.go

@@ -6,7 +6,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 )
 
-func TestResourceType(t *testing.T) {
+func TestResourceSchemaType(t *testing.T) {
 	cases := []struct {
 		desc string
 		src  string
@@ -26,7 +26,7 @@ resource "aws_s3_bucket" "example" {}
 	for _, tc := range cases {
 		t.Run(tc.desc, func(t *testing.T) {
 			r := parseTestResource(t, tc.src)
-			got := r.Type()
+			got := r.SchemaType()
 			if got != tc.want {
 				t.Errorf("got = %s, but want = %s", got, tc.want)
 			}