Change getSourceIDsHash to getSourceIdsHash in the Migrate module

Problem/Motivation

We should follow coding standards and use proper camelCase for our method names: "Ids", not "IDs".

PHP is case-insensitive, so the code will work with or without this change. Anyone searching for getSourceIdsHash with a case-sensitive search will miss getSourceIDsHash, so fixing this will save some headaches. It is also possible that, at some point, we will do a bulk search-and-replace involving these method names.

The getSourceIdsHash() method is defined in the Migrate module, but we should change it wherever it is used. Currently, I find one use in a test inside the Node module.

Proposed resolution

Search for all instances of the incorrect capitalization and replace them with the correct capitalization. Something like this should be effective:

grep -rni getSourceIdsHash core | grep -v getSourceIdsHash
grep -rni 'getSourceIdsHash.*getSourceIdsHash' core

For those less familiar with grep:

• The -r option means to search recursively (inside core/).
• The -n option asks grep to show the line numbers.
• The -i option means to ignore case, so search for all variants.
• The | (pipe) operator sends the output of the first command to the input of the second.
• The -v option inverts the results, filtering out any lines that match.
• The second and fourth commands are there just in case there are lines that have the string more than once, and one of them has the correct capitalization. Any such lines would be missed by the first and third command.

Remaining tasks

User interface changes

None

API changes

None

Data model changes

None