code: public static ExecutableElement getExecutableElement(String methodString)
      {
          if (methodString == null)
          {
              throw new NullPointerException();
          }
          if (methodString.isEmpty())
          {
              return null;
          }
          int i1 = methodString.indexOf(' ');
          if (i1 == -1)
          {
              throw new IllegalArgumentException(methodString+" illegal");
          }
          TypeElement cls = El.getTypeElement(methodString.substring(0, i1));
          if (cls == null)
          {
              throw new IllegalArgumentException(methodString+" class not found");
          }
          int i2 = methodString.indexOf('(', i1);
          if (i2 == -1)
          {
              throw new IllegalArgumentException(methodString+" illegal");
          }
          String name = methodString.substring(i1+1, i2);
          int i3 = methodString.indexOf(')', i2);
          if (i3 == -1)
          {
              throw new IllegalArgumentException(methodString+" illegal");
          }
          if (i3-i2 > 1)
          {
              String[] args = methodString.substring(i2+1, methodString.length()-1).split(",");
              TypeMirror[] params = new TypeMirror[args.length];
              for (int ii=0;ii<args.length;ii++)
              {
                  params[ii] = Typ.getTypeFor(args[ii]);
              }
              return getMethod(cls, name, params);
          }
          else
          {
              return getMethod(cls, name);
          }
      }
docs: Returns ExecutableElement from text form. Format is
  &lt;canonical name of method class&gt; ' ' &lt;method name&gt; '(' arguments ')'
  
  Arguments is a comma separated list of argument type names. Argument type name
  is canonical name of argument class. Arrays however are printed with leading '['.
  Example T0.class.getDeclaredMethod("m1", String.class, int.class, long[].class)
  produces "org.vesalainen.bcc.T0 m1(java.lang.String,int,[long)"
  
  @param methodString
  @return