Add single page retrieval method to result set and prevent setting nil environment.
Add single page retrieval method to result set and prevent setting nil environment.

samphilipd/github,GistBox/github,wicky-info/github,befairyliu/github,MalachiTatum/github,peter-murach/github,durai145/github,piotrmurach/github,yaoxiaoyong/github,firstval/github,davengeo/github,cocktail-io/github,joshsoftware/github,anabhilash619/github