Rethink line of code into action (method call) and result (assignment)

Most lines of code do something, call a method, and store the result.

Focus on method invocations as main element in line of code, then add small grammar to supplement
1) Invoke method and store result
2) If statement with method or variable
3) If condition variable with method or variable conditions separated by "and" / "or"

Focus on parsing line up to determine method name. Then, small grammar to handle what to do with the result.

The issue does not name any files, tests, or entry points. Start by locating the parser for method invocations, then determine how it currently represents assignments and conditional expressions. Done means supporting method calls with stored results and the described if-condition combinations using and/or.

Written by the indexing model from the issue text.