BooleanInversion.java

SimpleName newMethodName = invocation.getAST().newSimpleName(“setDisabled”);
astRewrite.set(invocation, MethodInvocation.NAME_PROPERTY, newMethodName, null);

BooleanLiteral booleanLiteral = (BooleanLiteral) invocation.arguments().get(0);
astRewrite.set(booleanLiteral, BooleanLiteral.BOOLEAN_VALUE_PROPERTY,
  !booleanLiteral.booleanValue(), null);