private List <ProjectItemInstance> FindItemsUsingMatchOnMetadata(
ICollection <ProjectItemInstance> items,
ProjectItemGroupTaskItemInstance child,
ItemBucket bucket,
HashSet <string> matchOnMetadata,
MatchOnMetadataOptions options)
{
ErrorUtilities.VerifyThrowArgumentNull(matchOnMetadata, nameof(matchOnMetadata));
var itemSpec = new ItemSpec <ProjectPropertyInstance, ProjectItemInstance>(child.Remove, bucket.Expander, child.RemoveLocation, Project.Directory, true);
ProjectFileErrorUtilities.VerifyThrowInvalidProjectFile(
itemSpec.Fragments.Count == 1 &&
itemSpec.Fragments.First() is ItemSpec <ProjectPropertyInstance, ProjectItemInstance> .ItemExpressionFragment &&
matchOnMetadata.Count == 1,
new BuildEventFileInfo(string.Empty),
"OM_MatchOnMetadataIsRestrictedToOnlyOneReferencedItem",
child.RemoveLocation,
child.Remove);
return(items.Where(item => itemSpec.MatchesItemOnMetadata(item, matchOnMetadata, options)).ToList());
}