class SQLite3::Database::FunctionProxy

the context functions will be available.
it is non-nil, it must quack like a Hash. If it is nil, then none of
If context is non-nil, the functions context will be set to that. If
Create a new FunctionProxy that encapsulates the given +func+ object.

def initialize(driver, func, context = nil)
  @driver = driver
  @func = func
  @context = context
end