public void delPermissionTargetXDIStatement(
XDIAddress permissionXDIAddress, XDIStatement targetXDIStatement) {
if (permissionXDIAddress == null || targetXDIStatement == null)
throw new NullPointerException();
// delete the permission statement
XdiInnerRoot xdiInnerRoot = this.getXdiEntity().getXdiInnerRoot(permissionXDIAddress, false);
if (xdiInnerRoot == null) return;
Statement statement = xdiInnerRoot.getContextNode().getStatement(targetXDIStatement);
if (statement == null) return;
statement.delete();
}
