internal static void SafeBegin(this org.pdfclown.documents.contents.composition.BlockComposer blockComposer, RectangleF frame,
org.pdfclown.documents.contents.composition.XAlignmentEnum xAlignment = org.pdfclown.documents.contents.composition.XAlignmentEnum.Left,
org.pdfclown.documents.contents.composition.YAlignmentEnum yAlignment = org.pdfclown.documents.contents.composition.YAlignmentEnum.Top)
{
VerificarRetangulo(frame, blockComposer.BaseComposer.Scanner.CanvasSize);
blockComposer.Begin(frame, xAlignment, yAlignment);
}