src/org/nutz/repo/org/objectweb/asm/MethodVisitor.java
public void visitLineNumber(int line, Label start) {
        if (mv != null) {
            mv.visitLineNumber(line, start);
        }
    }
public void visitLineNumber(int line, Label start) {
        if (mv != null) {
            mv.visitLineNumber(line, start);
        }
    }
Visits a line number declaration.

@param line
a line number. This number refers to the source file from
which the class was compiled.
@param start
the first instruction corresponding to this line number.
@throws IllegalArgumentException
if <tt>start</tt> has not already been visited by this
visitor (by the {@link #visitLabel visitLabel} method).