public void inExpr() {
    CompiledValue collnExpr = TypeUtils.checkCast(pop(), CompiledValue.class);
    CompiledValue elm = TypeUtils.checkCast(pop(), CompiledValue.class);
    push(new CompiledIn(elm, collnExpr));
  }
Processes import statements only. This compiler instance remembers the imports and can be used
to compile other strings with this context info
geode-core/src/main/java/org/apache/geode/cache/query/internal/QCompiler.java