TypeDeclaration td = ast.newTypeDeclaration();
td.setName(ast.newSimpleName("Foo"));
TypeParameter tp = ast.newTypeParameter();
tp.setName(ast.newSimpleName("X"));
td.typeParameters().add(tp);
cu.types().add(td);
MethodDeclaration md = ast.newMethodDeclaration();
md.modifiers().add(ast.newModifier(ModifierKeyword.PUBLIC_KEYWORD));
md.setName(ast.newSimpleName("bar"));