[NTG-context] Environments

[Manuel Blanco]

Your code in the .sty is a little bit unconventional. In any case, the
most common in LaTeX is to use etoolbox package.

    \usepackage{etoolbox}
    \newenvironment{env}{whatever goes here}{whatever goes here}
    \AtBeginEnvironment{env}{<begin environment>}
    \AtEndEnvironment{env}{<end environment>}
    \BeforeBeginEnvironment{<before environment>}
    \AfterEndEnvironment{<after environment>}