fix some comments

Signed-off-by: cui fliter <imcusg@gmail.com>

kyaml/openapi/kustomizationapi/swagger.go

@@ -64,7 +64,7 @@ func (fi bindataFileInfo) Mode() os.FileMode {
 	return fi.mode
 }
 
-// Mode return file modify time
+// ModTime return file modify time
 func (fi bindataFileInfo) ModTime() time.Time {
 	return fi.modTime
 }

kyaml/openapi/openapi.go

@@ -182,7 +182,7 @@ type ResourceSchema struct {
 	Schema *spec.Schema
 }
 
-// IsEmpty returns true if the ResourceSchema is empty
+// IsMissingOrNull returns true if the ResourceSchema is missing or null
 func (rs *ResourceSchema) IsMissingOrNull() bool {
 	if rs == nil || rs.Schema == nil {
 		return true