whenNotNull and whenHas support

[alex-watchenterprise]

v0.11.25

Scramble doing a great job with recognizing as optional

• merge
• mergeWhen
• when

However, it will be very good to also add a support for

• whenHas
• whenNotNull

because now we need to do something like this:

$this->when($this->title, $this->title)

[romalytvynenko]

@alex-watchenterprise released in v0.11.30