-------- @what pkgdecl --------
identifier
source file
modes: [definition describe freevars implements referrers]
srcdir: testdata/src
import path: what

-------- @what call --------
identifier
function call
expression statement
block
function declaration
source file
modes: [definition describe freevars implements referrers]
srcdir: testdata/src
import path: what

-------- @what var --------
variable declaration
variable declaration statement
block
function declaration
source file
modes: [describe freevars]
srcdir: testdata/src
import path: what

-------- @what recv --------
identifier
unary <- operation
expression statement
block
function declaration
source file
modes: [definition describe freevars implements referrers]
srcdir: testdata/src
import path: what
ch
ch

