isValidRecipe

Returns this CRecipe is a valid or not.

CRecipe's default implementation checks below conditions.

• CRecipe.items size (in range 1 to 36 ?)

• contained CMatter are all valid (Do all CRecipe.items elements pass CMatter.isValidMatter?)

// (Usage)
val recipe: CRecipe = ~~~
recipe.isValidRecipe().exceptionOrNull()?.let{ throw it }